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4. Chemical Bonding and Molecular Structure

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Question 1/193
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Mark Review

Choose the polar molecule from the following :

[27-Jan-2024 Shift 1]

Choose the polar molecule from the following :

[27-Jan-2024 Shift 1]

A
CCl₄
CCl₄

B
CO₂
CO₂

C
CH₂ = CH₂
CH₂ = CH₂

D
CHCl₃
CHCl₃
Question 2/193
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Mark Review

Sum of bond order of CO and NO⁺ is____

[27-Jan-2024 Shift 1]

Sum of bond order of CO and NO⁺ is____

[27-Jan-2024 Shift 1]
Question 3/193
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Mark Review

Number of compounds with one lone pair of electrons on central atom amongst following is O₃, H₂O, SF₄, ClF₃, NH₃, BrF₅, XeF₄ __

[29-Jan-2024 Shift 1]

Number of compounds with one lone pair of electrons on central atom amongst following is O₃, H₂O, SF₄, ClF₃, NH₃, BrF₅, XeF₄ __

[29-Jan-2024 Shift 1]
Question 4/193
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Mark Review

The number of species from the following which are paramagnetic and with bond order equal to one is____

[29-Jan-2024 Shift 1]

The number of species from the following which are paramagnetic and with bond order equal to one is____

[29-Jan-2024 Shift 1]
Question 5/193
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Mark Review

The total number of molecules with zero dipole moment among CH₄, BF₃, H₂O, HF, NH₃, CO₂ and SO₂ is______

[29-Jan-2024 Shift 2]

The total number of molecules with zero dipole moment among CH₄, BF₃, H₂O, HF, NH₃, CO₂ and SO₂ is______

[29-Jan-2024 Shift 2]
Question 6/193
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Mark Review

The total number of 'Sigma' and Pi bonds in 2formylhex-4-enoic acid is

[29-Jan-2024 Shift 2]

The total number of 'Sigma' and Pi bonds in 2formylhex-4-enoic acid is

[29-Jan-2024 Shift 2]
Question 7/193
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Mark Review

The total number of anti bonding molecular orbitals, formed from 2 s and 2p atomic orbitals in a diatomic molecule is___

[29-Jan-2024 Shift 2]

The total number of anti bonding molecular orbitals, formed from 2 s and 2p atomic orbitals in a diatomic molecule is___

[29-Jan-2024 Shift 2]
Question 8/193
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Mark Review

Match List-I with List-II

List-I
Molecule List-II
Shape

(A) BrF₅ (I) T-shape

(B) H₂O (II) See saw

(C) ClF₃ (III) Bent

(D) SF₄ (IV) Square pyramidal

[30-Jan-2024 Shift 1]

Match List-I with List-II

List-I
Molecule List-II
Shape

(A) BrF₅ (I) T-shape

(B) H₂O (II) See saw

(C) ClF₃ (III) Bent

(D) SF₄ (IV) Square pyramidal

[30-Jan-2024 Shift 1]

A
(A)-I, (B)-II, (C)-IV, (D)-III
(A)-I, (B)-II, (C)-IV, (D)-III

B
(A) -II, (B)-I, (C)-III, (D)-IV
(A) -II, (B)-I, (C)-III, (D)-IV

C
(A)-III, (B)-IV, (C)-I, (D)-II
(A)-III, (B)-IV, (C)-I, (D)-II

D
(A)-IV, (B)-III, (C)-I, (D)-II
(A)-IV, (B)-III, (C)-I, (D)-II
Question 9/193
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Mark Review

The total number of molecular orbitals formed from 2 s and 2p atomic orbitals of a diatomic molecule

[30-Jan-2024 Shift 1]

The total number of molecular orbitals formed from 2 s and 2p atomic orbitals of a diatomic molecule

[30-Jan-2024 Shift 1]
Question 10/193
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Mark Review

Given below are two statements:

Statement-I: Since fluorine is more electronegative than nitrogen, the net dipole moment of NF₃ is greater than NH₃.
Statement-II: In NH₃, the orbital dipole due to lone pair and the dipole moment of NH bonds are in opposite direction, but in NF3 the orbital dipole due to lone pair and dipole moments of N-F bonds are in same direction.

In the light of the above statements. Choose the most appropriate from the options given below.

[30-Jan-2024 Shift 2]

Given below are two statements:

Statement-I: Since fluorine is more electronegative than nitrogen, the net dipole moment of NF₃ is greater than NH₃.
Statement-II: In NH₃, the orbital dipole due to lone pair and the dipole moment of NH bonds are in opposite direction, but in NF3 the orbital dipole due to lone pair and dipole moments of N-F bonds are in same direction.

In the light of the above statements. Choose the most appropriate from the options given below.

[30-Jan-2024 Shift 2]

A
Statement I is true but Statement II is false.
Statement I is true but Statement II is false.

B
Both Statement I and Statement II are false.
Both Statement I and Statement II are false.

C
Both statement I and Statement II is are true.
Both statement I and Statement II is are true.

D
Statement I is false but Statement II is are true.
Statement I is false but Statement II is are true.
Question 11/193
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Mark Review

The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals
A. have the same energy
B. have the minimum overlap
C. have same symmetry about the molecular axis
D. have different symmetry about the molecular axis
Choose the most appropriate from the options given below:

[31-Jan-2024 Shift 1]

The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals
A. have the same energy
B. have the minimum overlap
C. have same symmetry about the molecular axis
D. have different symmetry about the molecular axis
Choose the most appropriate from the options given below:

[31-Jan-2024 Shift 1]

A
A, B, C only
A, B, C only

B
A and C only
A and C only

C
B, C, D only
B, C, D only

D
B and D only
B and D only
Question 12/193
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Mark Review

The number of species from the following in which the central atom uses sp3 hybrid orbitals in its bonding is______

[31-Jan-2024 Shift 1]

The number of species from the following in which the central atom uses sp3 hybrid orbitals in its bonding is______

[31-Jan-2024 Shift 1]
Question 13/193
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Mark Review

Which of the following is least ionic?

[31-Jan-2024 Shift 2]

Which of the following is least ionic?

[31-Jan-2024 Shift 2]

A
BaCl₂
BaCl₂

B
AgCl
AgCl

C
KCl
KCl

D
CoCl₂
CoCl₂
Question 14/193
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Mark Review

A diatomic molecule has a dipole moment of 1.2D. If the bond distance is 1Å, then fractional charge on each atom is ____ × 10⁻¹esu.

(Given 1D = 10⁻¹⁸ esu cm)

[31-Jan-2024 Shift 2]

A diatomic molecule has a dipole moment of 1.2D. If the bond distance is 1Å, then fractional charge on each atom is ____ × 10⁻¹esu.

(Given 1D = 10⁻¹⁸ esu cm)

[31-Jan-2024 Shift 2]
Question 15/193
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Mark Review

Arrange the bonds in order of increasing ionic character in the molecules. LiF, K₂O, N₂, SO₂ and CIF₃

[1-Feb-2024 Shift 1]

Arrange the bonds in order of increasing ionic character in the molecules. LiF, K₂O, N₂, SO₂ and CIF₃

[1-Feb-2024 Shift 1]

A

B

C

D
Question 16/193
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Mark Review

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : PH₃ has lower boiling point than NH₃.
Reason (R) : In liquid state NH₃ molecules are associated through vander waal's forces, but PH₃ molecules are associated through hydrogen bonding.

In the light of the above statements, choose the most appropriate answer from the options given below:

[1-Feb-2024 Shift 1]

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : PH₃ has lower boiling point than NH₃.
Reason (R) : In liquid state NH₃ molecules are associated through vander waal's forces, but PH₃ molecules are associated through hydrogen bonding.

In the light of the above statements, choose the most appropriate answer from the options given below:

[1-Feb-2024 Shift 1]

A
Both (A) and (R) are correct and (R) is not the correct explanation of (A)
Both (A) and (R) are correct and (R) is not the correct explanation of (A)

B
(A) is not correct but (R) is correct
(A) is not correct but (R) is correct

C
Both (A) and (R) are correct but (R) is the correct explanation of (A)
Both (A) and (R) are correct but (R) is the correct explanation of (A)

D
(A) is correct but (R) is not correct
(A) is correct but (R) is not correct
Question 17/193
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Mark Review

The number of molecules/ion/s having trigonal bipyramidal shape is ........ .

[1-Feb-2024 Shift 1]

The number of molecules/ion/s having trigonal bipyramidal shape is ........ .

[1-Feb-2024 Shift 1]
Question 18/193
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Mark Review

Given below are two statements :

Statement (I) : A π bonding MO has lower electron density above and below the inter-nuclear asix.
Statement (II) : The π* antibonding MO has a node between the nuclei.

In the light of the above statements, choose the most appropriate answer from the options given below:

[1-Feb-2024 Shift 2]

Given below are two statements :

Statement (I) : A π bonding MO has lower electron density above and below the inter-nuclear asix.
Statement (II) : The π* antibonding MO has a node between the nuclei.

In the light of the above statements, choose the most appropriate answer from the options given below:

[1-Feb-2024 Shift 2]

A
Both Statement I and Statement II are false
Both Statement I and Statement II are false

B
Both Statement I and Statement II are true
Both Statement I and Statement II are true

C
Statement I is false but Statement II is true
Statement I is false but Statement II is true

D
Statement I is true but Statement II is false
Statement I is true but Statement II is false
Question 19/193
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Mark Review

Select the compound from the following that will show intramolecular hydrogen bonding.

[1-Feb-2024 Shift 2]

Select the compound from the following that will show intramolecular hydrogen bonding.

[1-Feb-2024 Shift 2]

A
H₂O
H₂O

B
NH₃
NH₃

C
C₂H₅OH
C₂H₅OH

D
Question 20/193
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Mark Review

What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : N2:N2+;O2;O2+?

[24-Jan-2023 Shift 2]

What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : N2:N2+;O2;O2+?

[24-Jan-2023 Shift 2]

A
0,1,2,1
0,1,2,1

B
2,1,2,1
2,1,2,1

C
0,1,0,1
0,1,0,1

D
2,1,0,1
2,1,0,1
Question 21/193
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Mark Review

The total number of lone pairs of electrons on oxygen atoms of ozone is _______
[25-Jan-2023 Shift 1]

The total number of lone pairs of electrons on oxygen atoms of ozone is _______
[25-Jan-2023 Shift 1]
Question 22/193
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Mark Review

Statement I :- Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre.
Statement II :- The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules.
In the light of the above statements, choose the most appropriate answer from the options given below :-

[25-Jan-2023 Shift 2]

Statement I :- Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre.
Statement II :- The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules.
In the light of the above statements, choose the most appropriate answer from the options given below :-

[25-Jan-2023 Shift 2]

A
Both Statement I and Statement II are correct.
Both Statement I and Statement II are correct.

B
Statement I is incorrect but Statement II is correct.
Statement I is incorrect but Statement II is correct.

C
Both Statement I and Statement II are incorrect.
Both Statement I and Statement II are incorrect.

D
Statement I is correct but Statement II is incorrect.
Statement I is correct but Statement II is incorrect.
Question 23/193
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Mark Review

The number of given orbitals which have electron density along the axis is ________
px,py,pz,dxy,dyz,dxz,dz,dx2−y2
[25-Jan-2023 Shift 2]

The number of given orbitals which have electron density along the axis is ________
px,py,pz,dxy,dyz,dxz,dz,dx2−y2
[25-Jan-2023 Shift 2]
Question 24/193
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Mark Review

According to MO theory the bond orders for O2‌2−, CO and NO+ respectively, are

[29-Jan-2023 Shift 2]

According to MO theory the bond orders for O2‌2−, CO and NO+ respectively, are

[29-Jan-2023 Shift 2]

A
1,3 and 3
1,3 and 3

B
1, 3 and 2
1, 3 and 2

C
1,2 and 3
1,2 and 3

D
2,3 and 3
2,3 and 3
Question 25/193
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Mark Review

Match List I with List II:

[30-Jan-2023 Shift 2]

Match List I with List II:

[30-Jan-2023 Shift 2]

A
A - II, B - I, C - III, D - IV
A - II, B - I, C - III, D - IV

B
A - I, B - II, C - III, D - IV
A - I, B - II, C - III, D - IV

C
A - II, B - I, C - IV, D - III
A - II, B - I, C - IV, D - III

D
A - I, B- II, C - IV, D - III
A - I, B- II, C - IV, D - III
Question 26/193
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Mark Review

Match List I with List II

Choose the correct answer from the options given below :

[31-Jan-2023 Shift 1]

Match List I with List II

Choose the correct answer from the options given below :

[31-Jan-2023 Shift 1]

A
A-IV, B-III, C-II, D-I
A-IV, B-III, C-II, D-I

B
A-II, B-I, C-III, D-IV
A-II, B-I, C-III, D-IV

C
A-IV, B-I, C-II, D-III
A-IV, B-I, C-II, D-III

D
A-II, B-I, C-IV, D-III
A-II, B-I, C-IV, D-III
Question 27/193
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Mark Review

For OF2 molecule consider the following:
(A) Number of lone pairs on oxygen is 2 .
(B) FOF angle is less than 104.5∘.
(C) Oxidation state of O is −2.
(D) Molecule is bent ' V ' shaped.
(E) Molecular geometry is linear.
Correct options are:

[30-Jan-2023 Shift 1]

For OF2 molecule consider the following:
(A) Number of lone pairs on oxygen is 2 .
(B) FOF angle is less than 104.5∘.
(C) Oxidation state of O is −2.
(D) Molecule is bent ' V ' shaped.
(E) Molecular geometry is linear.
Correct options are:

[30-Jan-2023 Shift 1]

A
C, D, E only
C, D, E only

B
B, E, A only
B, E, A only

C
A, C, D only
A, C, D only

D
A, B, D only
A, B, D only
Question 28/193
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Mark Review

Match List I with List II

Choose the correct answer from the options given below:

[30-Jan-2023 Shift 1]

Match List I with List II

Choose the correct answer from the options given below:

[30-Jan-2023 Shift 1]

A
A - II, B - III, C - IV, D - I
A - II, B - III, C - IV, D - I

B
A - IV, B - III, C - II, D - I
A - IV, B - III, C - II, D - I

C
A - II, B - I, C - IV, D - III
A - II, B - I, C - IV, D - III

D
A - IV, B - I, C - II, D - III
A - IV, B - I, C - II, D - III
Question 29/193
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Mark Review

Amongst the following, the number of species having the linear shape is _______.
XeF2,I3+,C3O2,I3−,CO2,SO2,BeCl‌ and ‌BCl2Θ
[31-Jan-2023 Shift 2]

Amongst the following, the number of species having the linear shape is _______.
XeF2,I3+,C3O2,I3−,CO2,SO2,BeCl‌ and ‌BCl2Θ
[31-Jan-2023 Shift 2]
Question 30/193
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Mark Review

The number of species from the following which have square pyramidal structure is
PF5,BrF4−,IF5;BrF5,XeOF4,ICl4−
[6-Apr-2023 shift 1]

The number of species from the following which have square pyramidal structure is
PF5,BrF4−,IF5;BrF5,XeOF4,ICl4−
[6-Apr-2023 shift 1]
Question 31/193
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Mark Review

The number of species having a square planar shape from the following is______
XeF4,‌‌SF4,‌‌SiF4,‌‌BF4−,BrF4−,‌‌[Cu(NH3)4]2+,
[FeCl4]2−,[PtCl4]2−
[6-Apr-2023 shift 2]

The number of species having a square planar shape from the following is______
XeF4,‌‌SF4,‌‌SiF4,‌‌BF4−,BrF4−,‌‌[Cu(NH3)4]2+,
[FeCl4]2−,[PtCl4]2−
[6-Apr-2023 shift 2]
Question 32/193
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Mark Review

In an ice crystal, each water molecule is hydrogen bonded to ________ neighbouring molecules.
[6-Apr-2023 shift 2]

In an ice crystal, each water molecule is hydrogen bonded to ________ neighbouring molecules.
[6-Apr-2023 shift 2]
Question 33/193
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Mark Review

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Butan-1-ol has higher boiling point than ethoxyethane.
Reason R : Extensive hydrogen bonding leads to stronger association of molecules. In the light of the above statements, choose the correct answer from the options given below:

[8-Apr-2023 shift 1]

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Butan-1-ol has higher boiling point than ethoxyethane.
Reason R : Extensive hydrogen bonding leads to stronger association of molecules. In the light of the above statements, choose the correct answer from the options given below:

[8-Apr-2023 shift 1]

A
Both A and R are true but R is not the correct explanation of A
Both A and R are true but R is not the correct explanation of A

B
Both A and R are true and R is the correct explanation of A
Both A and R are true and R is the correct explanation of A

C
A is false but R is true
A is false but R is true

D
A is true but R is false
A is true but R is false
Question 34/193
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Mark Review

The number of following factors which affect the percent covalent character of the ionic bond is ________

[8-Apr-2023 shift 1]

The number of following factors which affect the percent covalent character of the ionic bond is ________

[8-Apr-2023 shift 1]

A
Polarising power of cation
Polarising power of cation

B
Extent of distortion of anion
Extent of distortion of anion

C
Polarisability of the anion
Polarisability of the anion

D
Polarising power of anion
Polarising power of anion
Question 35/193
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Mark Review

The number of species from the following carrying a single lone pair on central atom Xenon is ________XeF5‌+,XeO3,XeO2F2,XeF5−,XeO3F2,XeOF4,XeF4
[8-Apr-2023 shift 2]

The number of species from the following carrying a single lone pair on central atom Xenon is ________XeF5‌+,XeO3,XeO2F2,XeF5−,XeO3F2,XeOF4,XeF4
[8-Apr-2023 shift 2]
Question 36/193
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Mark Review

The pair from the following pairs having both compounds with net non-zero dipole moment is

[10-Apr-2023 shift 1]

The pair from the following pairs having both compounds with net non-zero dipole moment is

[10-Apr-2023 shift 1]

A
cis-butene, trans-butene
cis-butene, trans-butene

B
Benzene, anisidine
Benzene, anisidine

C
CH2Cl2,CHCl3
CH2Cl2,CHCl3

D
1,4-Dichlorohenzene, 1,3-Dichlorobenzene
1,4-Dichlorohenzene, 1,3-Dichlorobenzene
Question 37/193
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Mark Review

The compound which does not exist is

[10-Apr-2023 shift 1]

The compound which does not exist is

[10-Apr-2023 shift 1]

A
PbEt4
PbEt4

B
BeH2
BeH2

C
NaO2
NaO2

D
(NH4)2BeF4
(NH4)2BeF4
Question 38/193
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Mark Review

The number of bent-shaped molecule/s from the following is _________
N3−,NO2−,I3−,O3,SO2
[10-Apr-2023 shift 1]

The number of bent-shaped molecule/s from the following is _________
N3−,NO2−,I3−,O3,SO2
[10-Apr-2023 shift 1]
Question 39/193
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Mark Review

The sum of lone pairs present on the central atom of the interhalogen IF5 and IF7 is _______
[10-Apr-2023 shift 1]

The sum of lone pairs present on the central atom of the interhalogen IF5 and IF7 is _______
[10-Apr-2023 shift 1]
Question 40/193
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Mark Review

Match list I with list II

Choose correct answer from the options given below:

[11-Apr-2023 shift 1]

Match list I with list II

Choose correct answer from the options given below:

[11-Apr-2023 shift 1]

A
A-III, B-IV, C-I, D-II
A-III, B-IV, C-I, D-II

B
A-III, B-IV, C-II, D-I
A-III, B-IV, C-II, D-I

C
A-III, B-I, C-II, D-IV
A-III, B-I, C-II, D-IV

D
A-III, B-II, C-I, D-IV
A-III, B-II, C-I, D-IV
Question 41/193
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Mark Review

Which one of the following pairs is an example of polar molecular solids?

[11-Apr-2023 shift 2]

Which one of the following pairs is an example of polar molecular solids?

[11-Apr-2023 shift 2]

A
SO2( s),CO2( s)
SO2( s),CO2( s)

B
SO2( s),NH2 (s)
SO2( s),NH2 (s)

C
MgO( s),SO2 (s)
MgO( s),SO2 (s)

D
HCl (s), AlN(s)
HCl (s), AlN(s)
Question 42/193
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Mark Review

The maximum number of lone pairs of electrons on the central atom from the following species is ________
ClO3−,XeF4,SF4 and I3−
[11-Apr-2023 shift 2]

The maximum number of lone pairs of electrons on the central atom from the following species is ________
ClO3−,XeF4,SF4 and I3−
[11-Apr-2023 shift 2]
Question 43/193
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Mark Review

The bond order and magnetic property of acetylide ion are same as that of

[12-Apr-2023 shift 1]

The bond order and magnetic property of acetylide ion are same as that of

[12-Apr-2023 shift 1]

A
N2+
N2+

B
O2+
O2+

C
NO+
NO+

D
O2−
O2−
Question 44/193
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Mark Review

Given below are two statements :
Statement I : SbCl5 is more covalent than SbCl3
Statement II : The higher oxides of halogens also tend to be more stable than lower ones.
In the light of the above statements, choose the most appropriate answer from the options given below

[12-Apr-2023 shift 1]

Given below are two statements :
Statement I : SbCl5 is more covalent than SbCl3
Statement II : The higher oxides of halogens also tend to be more stable than lower ones.
In the light of the above statements, choose the most appropriate answer from the options given below

[12-Apr-2023 shift 1]

A
Statement I is correct but statement II is incorrect
Statement I is correct but statement II is incorrect

B
Both statement I and statement II are incorrect
Both statement I and statement II are incorrect

C
Both statement I and statement II are correct
Both statement I and statement II are correct

D
Statement I is incorrect but statement II is correct
Statement I is incorrect but statement II is correct
Question 45/193
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Mark Review

In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one?

[13-Apr-2023 shift 1]

In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one?

[13-Apr-2023 shift 1]

A
O2→O2+
O2→O2+

B
O2→O22−
O2→O22−

C
NO→NO+
NO→NO+

D
N2→N2+
N2→N2+
Question 46/193
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Mark Review

CIF5 at room temperature is a:

[13-Apr-2023 shift 1]

CIF5 at room temperature is a:

[13-Apr-2023 shift 1]

A
Colourless liquid with square pyramidal geometry
Colourless liquid with square pyramidal geometry

B
Colourless gas with trigonal bipyramidal geometry
Colourless gas with trigonal bipyramidal geometry

C
Colourless gas with square pyramidal geometry
Colourless gas with square pyramidal geometry

D
Colourless liquid with trigonal bipyramidal geometry
Colourless liquid with trigonal bipyramidal geometry
Question 47/193
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Mark Review

Among the following compounds, the one which shows highest dipole moment is
[13-Apr-2023 shift 1]

Among the following compounds, the one which shows highest dipole moment is
[13-Apr-2023 shift 1]

A

B

C

D
Question 48/193
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Mark Review

Match List I with List II

Choose the correct answer from the options given below :

[13-Apr-2023 shift 2]

Match List I with List II

Choose the correct answer from the options given below :

[13-Apr-2023 shift 2]

A
A-IV, B-I, C-III, D-II
A-IV, B-I, C-III, D-II

B
A-III, B-I, C-IV, D-II
A-III, B-I, C-IV, D-II

C
A-II, B-IV, C-I, D-III
A-II, B-IV, C-I, D-III

D
A-IV, B-II, C-III, D-I
A-IV, B-II, C-III, D-I
Question 49/193
4 / -1

Mark Review

Given below are two statements :
Statement I: SO2 and H2O both possess V-shaped structure.
Statement II : The bond angle of SO2 less than that of H2O
In the light of the above statements, choose the most appropriate answer from the options given below :

[13-Apr-2023 shift 2]

Given below are two statements :
Statement I: SO2 and H2O both possess V-shaped structure.
Statement II : The bond angle of SO2 less than that of H2O
In the light of the above statements, choose the most appropriate answer from the options given below :

[13-Apr-2023 shift 2]

A
Both Statements I and Statement II are incorrect
Both Statements I and Statement II are incorrect

B
Both Statement I and Statements II are correct
Both Statement I and Statements II are correct

C
Statement I is correct but Statement II is incorrect
Statement I is correct but Statement II is incorrect

D
Statements I is incorrect but Statement II is correct
Statements I is incorrect but Statement II is correct
Question 50/193
4 / -1

Mark Review

Consider the following statements:
(A) NF3 molecule has a trigonal planar structure.
(B) Bond length of N2 is shorter than O2
(C) Isoelectronic molecules or ions have identical bond order
(D) Dipole moment of HS is higher than that of water molecule.
Choose the correct answer from the options given below:

[15-Apr-2023 shift 1]

Consider the following statements:
(A) NF3 molecule has a trigonal planar structure.
(B) Bond length of N2 is shorter than O2
(C) Isoelectronic molecules or ions have identical bond order
(D) Dipole moment of HS is higher than that of water molecule.
Choose the correct answer from the options given below:

[15-Apr-2023 shift 1]

A
(A) and (B) are correct
(A) and (B) are correct

B
(C) and (D) are correct
(C) and (D) are correct

C
(B) and (C) are correct
(B) and (C) are correct

D
(A) and (D) are correct
(A) and (D) are correct
Question 51/193
4 / -1

Mark Review

The correct order of bond orders of C2‌2−,N2‌2− and O2‌2− is, respectively

[24-Jun-2022-Shift-2]

The correct order of bond orders of C2‌2−,N2‌2− and O2‌2− is, respectively

[24-Jun-2022-Shift-2]

A
C2‌2−<N2‌2−<O2‌2−
C2‌2−<N2‌2−<O2‌2−

B
O2‌2−<N2‌2−<C2‌2−
O2‌2−<N2‌2−<C2‌2−

C
C2‌2−<O2‌2−<N2‌2−
C2‌2−<O2‌2−<N2‌2−

D
N22−<C22−<O22−
N22−<C22−<O22−
Question 52/193
4 / -1

Mark Review

Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron?
(A) NO
(B) N2
(C) O2
(D) C2
(E) B2
Choose the most appropriate answer from the options given below:

[25-Jun-2022-Shift-1]

Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron?
(A) NO
(B) N2
(C) O2
(D) C2
(E) B2
Choose the most appropriate answer from the options given below:

[25-Jun-2022-Shift-1]

A
(A), (B), (C) only
(A), (B), (C) only

B
(B),(C),(E) only
(B),(C),(E) only

C
(A), (C) only
(A), (C) only

D
(D) only
(D) only
Question 53/193
4 / -1

Mark Review

Amongst BeF2,BF3,H2O,NH3,CCl4 and HCl, the number of molecules with non-zero net dipole moment is____
[25-Jun-2022-Shift-2]

Amongst BeF2,BF3,H2O,NH3,CCl4 and HCl, the number of molecules with non-zero net dipole moment is____
[25-Jun-2022-Shift-2]
Question 54/193
4 / -1

Mark Review

Consider the ions/molecule
O2+,O2,O2−,O22−
For increasing bond order the correct option is :

[26-Jun-2022-Shift-1]

Consider the ions/molecule
O2+,O2,O2−,O22−
For increasing bond order the correct option is :

[26-Jun-2022-Shift-1]

A
O22−<O2−<O2<O2+
O22−<O2−<O2<O2+

B
O2−<O22−<O2<O2+
O2−<O22−<O2<O2+

C
O2−<O22−<O2+<O2
O2−<O22−<O2+<O2

D
O2−<O2+<O22−<O2
O2−<O2+<O22−<O2
Question 55/193
4 / -1

Mark Review

The oxide which contains an odd electron at the nitrogen atom is

[26-Jun-2022-Shift-2]

The oxide which contains an odd electron at the nitrogen atom is

[26-Jun-2022-Shift-2]

A
N2O
N2O

B
NO2
NO2

C
N2O3
N2O3

D
N2O5
N2O5
Question 56/193
4 / -1

Mark Review

Amongst SF4,XeF4,CF4 and H2O, the number of species with two lone pairs of electrons is_____
[26-Jun-2022-Shift-2]

Amongst SF4,XeF4,CF4 and H2O, the number of species with two lone pairs of electrons is_____
[26-Jun-2022-Shift-2]
Question 57/193
4 / -1

Mark Review

Based upon VSEPR theory, match the shape (geometry) of the molecules in List-I with the molecules in List-II and select the most appropriate option.

[27-Jun-2022-Shift-1]

Based upon VSEPR theory, match the shape (geometry) of the molecules in List-I with the molecules in List-II and select the most appropriate option.

[27-Jun-2022-Shift-1]

A
(A)−(I),(B)−(II),(C)−(III),(D)−(IV)
(A)−(I),(B)−(II),(C)−(III),(D)−(IV)

B
(A) - (III), (B) - (IV), (C) - (I), (D) - (II)
(A) - (III), (B) - (IV), (C) - (I), (D) - (II)

C
(A)−(III),(B)−(IV),(C)−(I),(D)−(I)
(A)−(III),(B)−(IV),(C)−(I),(D)−(I)

D
(A)−(IV),(B)−(III),(C)−(I),(D)−(II)
(A)−(IV),(B)−(III),(C)−(I),(D)−(II)
Question 58/193
4 / -1

Mark Review

Identify the incorrect statement for PCl5 from the following.

[27-Jun-2022-Shift-2]

Identify the incorrect statement for PCl5 from the following.

[27-Jun-2022-Shift-2]

A
In this molecule, orbitals of phosphorous are assumed to undergo sp3d hybridization.

In this molecule, orbitals of phosphorous are assumed to undergo sp3d hybridization.

B
The geometry of PCl5 is trigonal bipyramidal.
The geometry of PCl5 is trigonal bipyramidal.

C
PCl5 has two axial bonds stronger than three equatorial bonds.
PCl5 has two axial bonds stronger than three equatorial bonds.

D
The three equatorial bonds of PCl5 lie in a plane.
The three equatorial bonds of PCl5 lie in a plane.
Question 59/193
4 / -1

Mark Review

The correct order of increasing intermolecular hydrogen bond strength is

[27-Jun-2022-Shift-2]

The correct order of increasing intermolecular hydrogen bond strength is

[27-Jun-2022-Shift-2]

A
HCN<H2O<NH3
HCN<H2O<NH3

B
HCN<CH4<NH3
HCN<CH4<NH3

C
CH4<HCN<NH3
CH4<HCN<NH3

D
CH4<NH3<HCN
CH4<NH3<HCN
Question 60/193
4 / -1

Mark Review

The hybridization of P exhibited in PF5 is spxdy. The value of y is____
[28-Jun-2022-Shift-1]

The hybridization of P exhibited in PF5 is spxdy. The value of y is____
[28-Jun-2022-Shift-1]
Question 61/193
4 / -1

Mark Review

In the structure of SF4, the lone pair of electrons on S is in.

[28-Jun-2022-Shift-2]

In the structure of SF4, the lone pair of electrons on S is in.

[28-Jun-2022-Shift-2]

A
equatorial position and there are two lone pair - bond pair repulsions at 90∘.
equatorial position and there are two lone pair - bond pair repulsions at 90∘.

B
equatorial position and there are three lone pair - bond pair repulsions at 90∘.
equatorial position and there are three lone pair - bond pair repulsions at 90∘.

C
axial position and there are three lone pair - bond pair repulsion at 90∘.
axial position and there are three lone pair - bond pair repulsion at 90∘.

D
axial position and there are two lone pair - bond pair repulsion at 90∘.
axial position and there are two lone pair - bond pair repulsion at 90∘.
Question 62/193
4 / -1

Mark Review

Arrange the following in the decreasing order of their covalent character:
(A) LiCl
(B) NaCl
(C) KCl
(D) CsCl
Choose the most appropriate answer from the options given below :

[29-Jun-2022-Shift-1]

Arrange the following in the decreasing order of their covalent character:
(A) LiCl
(B) NaCl
(C) KCl
(D) CsCl
Choose the most appropriate answer from the options given below :

[29-Jun-2022-Shift-1]

A
(A)>(C)>(B)>(D)
(A)>(C)>(B)>(D)

B
(B)>(A)>(C)>(D)
(B)>(A)>(C)>(D)

C
(A)>(B)>(C)>(D)
(A)>(B)>(C)>(D)

D
(A)>(B)>(D)>(C)
(A)>(B)>(D)>(C)
Question 63/193
4 / -1

Mark Review

Consider the species CH4,NH4+and BH4−. Choose the correct option with respect to the these species.

[29-Jun-2022-Shift-2]

Consider the species CH4,NH4+and BH4−. Choose the correct option with respect to the these species.

[29-Jun-2022-Shift-2]

A
They are isoelectronic and only two have tetrahedral structures.
They are isoelectronic and only two have tetrahedral structures.

B
They are isoelectronic and all have tetrahedral structures.
They are isoelectronic and all have tetrahedral structures.

C
Only two are isoelectronic and all have tetrahedral structures.
Only two are isoelectronic and all have tetrahedral structures.

D
Only two are isoelectronic and only two have tetrahedral structures.
Only two are isoelectronic and only two have tetrahedral structures.
Question 64/193
4 / -1

Mark Review

Number of lone pair(s) of electrons on central atom and the shape BrF3 molecule respectively, are

[29-Jun-2022-Shift-2]

Number of lone pair(s) of electrons on central atom and the shape BrF3 molecule respectively, are

[29-Jun-2022-Shift-2]

A
0, triangular planar.
0, triangular planar.

B
1, pyramidal.
1, pyramidal.

C
2, bent T-shape.
2, bent T-shape.

D
1, bent T-shape.
1, bent T-shape.
Question 65/193
4 / -1

Mark Review

Among the following species
N2,N2+,N2−,N22−,O2,O2+,O2−,O22−
the number of species showing dimagnesium is
[25-Jul-2022-Shift-1]

Among the following species
N2,N2+,N2−,N22−,O2,O2+,O2−,O22−
the number of species showing dimagnesium is
[25-Jul-2022-Shift-1]
Question 66/193
4 / -1

Mark Review

The total number of acidic oxides from the following list is
‌ NO, ‌N2O,B2O3,N2O5,CO,SO3,P4O10

[25-Jul-2022-Shift-2]

The total number of acidic oxides from the following list is
‌ NO, ‌N2O,B2O3,N2O5,CO,SO3,P4O10

[25-Jul-2022-Shift-2]

A
3
3

B
4
4

C
5
5

D
6
6
Question 67/193
4 / -1

Mark Review

The sum of number of lone pairs of electrons present on the central atoms of XeO3,XeOF4 and XeF6, is
[25-Jul-2022-Shift-2]

The sum of number of lone pairs of electrons present on the central atoms of XeO3,XeOF4 and XeF6, is
[25-Jul-2022-Shift-2]
Question 68/193
4 / -1

Mark Review

Match List-I with List-II :

Choose the correct answer from the options given below :

[26-Jul-2022-Shift-1]

Match List-I with List-II :

Choose the correct answer from the options given below :

[26-Jul-2022-Shift-1]

A
(A)−(I),(B)−(II),(C)−(II),(D)−(IV)
(A)−(I),(B)−(II),(C)−(II),(D)−(IV)

B
(A)−(IV),(B)−(II),(C)−(II),(D)−(I)
(A)−(IV),(B)−(II),(C)−(II),(D)−(I)

C
(A)−(II),(B)−(IV),(C)−(I),(D)−(III)
(A)−(II),(B)−(IV),(C)−(I),(D)−(III)

D
(A)−(II),(B)−(IV),(C)−(II),(D)−(I)
(A)−(II),(B)−(IV),(C)−(II),(D)−(I)
Question 69/193
4 / -1

Mark Review

Arrange the following in increasing order of their covalent character.
A. CaF2
B. CaCl2
C. CaBr2
D. CaI2
Choose the correct answer from the options given below.

[26-Jul-2022-Shift-2]

Arrange the following in increasing order of their covalent character.
A. CaF2
B. CaCl2
C. CaBr2
D. CaI2
Choose the correct answer from the options given below.

[26-Jul-2022-Shift-2]

A
B<A<C<D
B<A<C<D

B
A<B<C<D
A<B<C<D

C
A<B<D<C
A<B<D<C

D
A<C<B<D
A<C<B<D
Question 70/193
4 / -1

Mark Review

Given below are two statements.
Statement l2O2,Cu2+, and Fe3+ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.
Statement II: NaCl and H2O are weakly magnetized in opposite direction to magnetic field.
In the light of the above statements, choose the most appropriate answer from the options given below.

[27-Jul-2022-Shift-1]

Given below are two statements.
Statement l2O2,Cu2+, and Fe3+ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.
Statement II: NaCl and H2O are weakly magnetized in opposite direction to magnetic field.
In the light of the above statements, choose the most appropriate answer from the options given below.

[27-Jul-2022-Shift-1]

A
Both Statement I and Statement II are correct.

Both Statement I and Statement II are correct.

B
Both Statement I and Statement II are incorrect.

Both Statement I and Statement II are incorrect.

C
Statement I is correct but Statement II is incorrect.

Statement I is correct but Statement II is incorrect.

D
Statement I is incorrect but Statement II is correct.
Statement I is incorrect but Statement II is correct.
Question 71/193
4 / -1

Mark Review

Amongst the following, the number of oxide(s) which are paramagnetic in nature is
Na2O,KO2,NO2,N2O,ClO2,NO,SO2,Cl2O
[27-Jul-2022-Shift-1]

Amongst the following, the number of oxide(s) which are paramagnetic in nature is
Na2O,KO2,NO2,N2O,ClO2,NO,SO2,Cl2O
[27-Jul-2022-Shift-1]
Question 72/193
4 / -1

Mark Review

According to MO theory, number of species/ions from the following having identical bond order is ________.
CN−,NO+,O2,O2+,O22+
[27-Jul-2022-Shift-1]

According to MO theory, number of species/ions from the following having identical bond order is ________.
CN−,NO+,O2,O2+,O22+
[27-Jul-2022-Shift-1]
Question 73/193
4 / -1

Mark Review

Match List - I with List - II.

Choose the correct answer from the options given below :
[27-Jul-2022-Shift-2]

Match List - I with List - II.

Choose the correct answer from the options given below :
[27-Jul-2022-Shift-2]

A
(A)−(II),(B)−(I),(C)−(IV),(D)−(III)
(A)−(II),(B)−(I),(C)−(IV),(D)−(III)

B
(A)−(III),(B)−(IV),(C)−(I),(D)−(II)
(A)−(III),(B)−(IV),(C)−(I),(D)−(II)

C
(A)−(III),(B)−(I),(C)−(IV),(D)−(II)
(A)−(III),(B)−(I),(C)−(IV),(D)−(II)

D
(A)−(III),(B)−(IV),(C)−(II),(D)−(I)
(A)−(III),(B)−(IV),(C)−(II),(D)−(I)
Question 74/193
4 / -1

Mark Review

The number of molecule(s) or ion(s) from the following having non-planar structure is _________.
NO3−,H2O2,BF3,PCl3,XeF4,SF4,XeO3,PH4+,SO3,[Al(OH)4]−
[27-Jul-2022-Shift-2]

The number of molecule(s) or ion(s) from the following having non-planar structure is _________.
NO3−,H2O2,BF3,PCl3,XeF4,SF4,XeO3,PH4+,SO3,[Al(OH)4]−
[27-Jul-2022-Shift-2]
Question 75/193
4 / -1

Mark Review

The number of paramagnetic species among the following is _______.
B2,Li2,C2,C2−,O22−,O2+‌and ‌He2+
[28-Jul-2022-Shift-1]

The number of paramagnetic species among the following is _______.
B2,Li2,C2,C2−,O22−,O2+‌and ‌He2+
[28-Jul-2022-Shift-1]
Question 76/193
4 / -1

Mark Review

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Zero orbital overlap is an out of phase overlap.
Reason R: It results due to different orientation \/ direction of approach of orbitals.
In the light of the above statements, choose the correct answer from the options given below
[28-Jul-2022-Shift-2]

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Zero orbital overlap is an out of phase overlap.
Reason R: It results due to different orientation \/ direction of approach of orbitals.
In the light of the above statements, choose the correct answer from the options given below
[28-Jul-2022-Shift-2]

A
Both A and R are true and R is the correct explanation of A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true but R is NOT the correct explanation of A
Both A and R are true but R is NOT the correct explanation of A

C
A is true but R is false
A is true but R is false

D
A is false but R is true
A is false but R is true
Question 77/193
4 / -1

Mark Review

Number of lone pairs of electrons in the central atom of SCl2,O3,ClF3 and SF6, respectively, are :

[29-Jul-2022-Shift-1]

Number of lone pairs of electrons in the central atom of SCl2,O3,ClF3 and SF6, respectively, are :

[29-Jul-2022-Shift-1]

A
0,1,2 and 2
0,1,2 and 2

B
2,1,2 and 0
2,1,2 and 0

C
1,2,2 and 0
1,2,2 and 0

D
2,1,0 and 2
2,1,0 and 2
Question 78/193
4 / -1

Mark Review

Consider, PF5,BrF5,PCl3,SF6,[ICl4]−,ClF3 and IF5.
Amongst the above molecule(s)/ion(s), the number of molecule(s)/ion(s) having sp3d2 hybridisation is ________.
[29-Jul-2022-Shift-2]

Consider, PF5,BrF5,PCl3,SF6,[ICl4]−,ClF3 and IF5.
Amongst the above molecule(s)/ion(s), the number of molecule(s)/ion(s) having sp3d2 hybridisation is ________.
[29-Jul-2022-Shift-2]
Question 79/193
4 / -1

Mark Review

Match List-I with List-II

Choose the correct answer from the options given below.
[26 Feb 2021 Shift 2]

Match List-I with List-II

Choose the correct answer from the options given below.
[26 Feb 2021 Shift 2]

A
(A-iii), (B-iv), (C-i), (D-ii)
(A-iii), (B-iv), (C-i), (D-ii)

B
(A-i), (B-ii), (C-iii), (D-iv)
(A-i), (B-ii), (C-iii), (D-iv)

C
(A-ii), (B-i), (C-iv), (D-iii)
(A-ii), (B-i), (C-iv), (D-iii)

D
(A-iv), (B-iii), (C-ii), (D-i)
(A-iv), (B-iii), (C-ii), (D-i)
Question 80/193
4 / -1

Mark Review

According to molecular orbital theory, the species among the following that does not exist is
[25 Feb 2021 Shift 1]

According to molecular orbital theory, the species among the following that does not exist is
[25 Feb 2021 Shift 1]

A
O22−
O22−

B
He2−
He2−

C
Be2
Be2

D
He2+
He2+
Question 81/193
4 / -1

Mark Review

Which of the following are isostructural pairs?
A. SO42− and CrO42−
B. ‌‌SiCl4 and TiCl4
C. NH3 and NO3−
D. BCl3 and BrCl3
[24feb2021shift1]

Which of the following are isostructural pairs?
A. SO42− and CrO42−
B. ‌‌SiCl4 and TiCl4
C. NH3 and NO3−
D. BCl3 and BrCl3
[24feb2021shift1]

A
C and D only
C and D only

B
A and B only
A and B only

C
A and C only
A and C only

D
B and C only
B and C only
Question 82/193
4 / -1

Mark Review

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation.
Reason (R) Fluorine is the mostelectronegative element and hydrogenbonds in HF are symmetrical.
In the light of the above statements, choose the most appropriate answer from the options given below.

[26 Feb 2021 Shift 1]

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation.
Reason (R) Fluorine is the mostelectronegative element and hydrogenbonds in HF are symmetrical.
In the light of the above statements, choose the most appropriate answer from the options given below.

[26 Feb 2021 Shift 1]

A
A is false but R is true.

A is false but R is true.

B
Both A and R are true and R is the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

C
A is true R is false.

A is true R is false.

D
Both A and R are true but R is not the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
Question 83/193
4 / -1

Mark Review

The correct shape and I-I-I bond angles respectively in I3−, ion are
[24 Feb 2021 Shift 2]

The correct shape and I-I-I bond angles respectively in I3−, ion are
[24 Feb 2021 Shift 2]

A
distorted trigonal planar, 135∘ and 90∘
distorted trigonal planar, 135∘ and 90∘

B
T-shaped, 180∘ and 90∘
T-shaped, 180∘ and 90∘

C
Trigonal planar, 120∘
Trigonal planar, 120∘

D
Linear, 180∘
Linear, 180∘
Question 84/193
4 / -1

Mark Review

A hard substance melts at high temperature and is an insulator in both solid and in molten state.
This solid is most likely to be a
/an
[18 Mar 2021 Shift 2]

A hard substance melts at high temperature and is an insulator in both solid and in molten state.
This solid is most likely to be a
/an
[18 Mar 2021 Shift 2]

A
ionic solid
ionic solid

B
molecular solid
molecular solid

C
metallic solid
metallic solid

D
covalent solid
covalent solid
Question 85/193
4 / -1

Mark Review

The number of species below that have two lone pairs of electrons in their central atom is .......... (Round off to the nearest integer) SF4,BF4−,CIF3,AsF3,PCl5,BrF5,XeF4,SF6
[18 Mar 2021 Shift 2]

The number of species below that have two lone pairs of electrons in their central atom is .......... (Round off to the nearest integer) SF4,BF4−,CIF3,AsF3,PCl5,BrF5,XeF4,SF6
[18 Mar 2021 Shift 2]
Question 86/193
4 / -1

Mark Review

Amongst the following, the linear species is
[17 Mar 2021 Shift 2]

Amongst the following, the linear species is
[17 Mar 2021 Shift 2]

A
NO2
NO2

B
Cl2O
Cl2O

C
O3
O3

D
N3−
N3−
Question 87/193
4 / -1

Mark Review

A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is
[17 Mar 2021 Shift 1]

A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is
[17 Mar 2021 Shift 1]

A
see-saw
see-saw

B
planar triangular
planar triangular

C
T-shaped
T-shaped

D
trigonal pyramidal
trigonal pyramidal
Question 88/193
4 / -1

Mark Review

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) The H−O−H bond angle in water molecule is 104.5∘.
Reason (R) The lone pair - lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion.
[16 Mar 2021 Shift 1]

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) The H−O−H bond angle in water molecule is 104.5∘.
Reason (R) The lone pair - lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion.
[16 Mar 2021 Shift 1]

A
A is false but R is true.
A is false but R is true.

B
Both A and R are true, but R is not the correct correct explanation of A.

Both A and R are true, but R is not the correct correct explanation of A.

C
A is true but R is false.

A is true but R is false.

D
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, and R is the correct explanation of A.
Question 89/193
4 / -1

Mark Review

The total number of electrons in all bonding molecular orbitals of O22− is ........ .
(Round off to the nearest integer)
[27 Jul 2021 Shift 2]

The total number of electrons in all bonding molecular orbitals of O22− is ........ .
(Round off to the nearest integer)
[27 Jul 2021 Shift 2]
Question 90/193
4 / -1

Mark Review

The difference between bond orders of CO and NO⊕ is
x
2
where x= _______.
(Round off to the Nearest Integer)
[27 Jul 2021 Shift 1]

The difference between bond orders of CO and NO⊕ is
x
2
where x= _______.
(Round off to the Nearest Integer)
[27 Jul 2021 Shift 1]
Question 91/193
4 / -1

Mark Review

In the following the correct bond order sequence is:

[25 Jul 2021 Shift 2]

In the following the correct bond order sequence is:

[25 Jul 2021 Shift 2]

A
O22−>O2+>O2−>O2
O22−>O2+>O2−>O2

B
O2+>O2−>O22−>O2
O2+>O2−>O22−>O2

C
O2+>O2>O2−>O22−
O2+>O2>O2−>O22−

D
O2>O2−>O22−>O2+
O2>O2−>O22−>O2+
Question 92/193
4 / -1

Mark Review

Identify the species having one π-bond and maximum number of canonical forms from the following:

[25 Jul 2021 Shift 2]

Identify the species having one π-bond and maximum number of canonical forms from the following:

[25 Jul 2021 Shift 2]

A
SO3
SO3

B
O2
O2

C
SO2
SO2

D
CO32−
CO32−
Question 93/193
4 / -1

Mark Review

The set in which compounds have different nature is :

[20 Jul 2021 Shift 1]

The set in which compounds have different nature is :

[20 Jul 2021 Shift 1]

A
B(OH)3 and H3PO3
B(OH)3 and H3PO3

B
B(OH)3 and Al(OH)3
B(OH)3 and Al(OH)3

C
NaOH and Ca(OH)2
NaOH and Ca(OH)2

D
Be(OH)2 and Al(OH)3
Be(OH)2 and Al(OH)3
Question 94/193
4 / -1

Mark Review

Match List-I with List-II :

Choose the correct answer from the options given below :
[22 Jul 2021 Shift 2]

Match List-I with List-II :

Choose the correct answer from the options given below :
[22 Jul 2021 Shift 2]

A
(a)-( i), (b)-( ii), (c)-(v) and (d)-(iii)
(a)-( i), (b)-( ii), (c)-(v) and (d)-(iii)

B
(a)-(ii), (b)-(i), (c)-(iv) and (d)-(v)
(a)-(ii), (b)-(i), (c)-(iv) and (d)-(v)

C
(a)-(iii), (b)-( i), (c)-( v) and (d)-(iv)
(a)-(iii), (b)-( i), (c)-( v) and (d)-(iv)

D
(a)-(iv), (b)-(iii), (c)-(ii) and (d)-(v)
(a)-(iv), (b)-(iii), (c)-(ii) and (d)-(v)
Question 95/193
4 / -1

Mark Review

The hybridisations of the atomic orbitals of nitrogen in NO2−,NO2+and NH4+respectively are.
[20 Jul 2021 Shift 2]

The hybridisations of the atomic orbitals of nitrogen in NO2−,NO2+and NH4+respectively are.
[20 Jul 2021 Shift 2]

A
sp3,sp2 and sp
sp3,sp2 and sp

B
sp, sp ‌2 and sp ‌3
sp, sp ‌2 and sp ‌3

C
sp3, sp and sp2
sp3, sp and sp2

D
sp2,sp and sp3
sp2,sp and sp3
Question 96/193
4 / -1

Mark Review

The number of lone pairs of electrons on the central I atom in I3− is _________.
[20 Jul 2021 Shift 1]

The number of lone pairs of electrons on the central I atom in I3− is _________.
[20 Jul 2021 Shift 1]
Question 97/193
4 / -1

Mark Review

The bond order and magnetic behaviour of O2−ion are, respectively
[26 Aug 2021 Shift 2]

The bond order and magnetic behaviour of O2−ion are, respectively
[26 Aug 2021 Shift 2]

A
1.5 and paramagnetic
1.5 and paramagnetic

B
1.5 and diamagnetic
1.5 and diamagnetic

C
2 and diamagnetic
2 and diamagnetic

D
1 and paramagnetic
1 and paramagnetic
Question 98/193
4 / -1

Mark Review

The interaction energy of London forces between two particles is proportional to rx, where r is the distance between the particles. The value of x is
[26 Aug 2021 Shift 2]

The interaction energy of London forces between two particles is proportional to rx, where r is the distance between the particles. The value of x is
[26 Aug 2021 Shift 2]

A
3
3

B
−3
−3

C
−6
−6

D
6
6
Question 99/193
4 / -1

Mark Review

The number of species having non-pyramidal shape among the following is
(i) SO3(ii) NO3−(iii) PCl3(iv) CO32−
[27 Aug 2021 Shift 2]

The number of species having non-pyramidal shape among the following is
(i) SO3(ii) NO3−(iii) PCl3(iv) CO32−
[27 Aug 2021 Shift 2]
Question 100/193
4 / -1

Mark Review

According to molecular orbital theory, the number of unpaired electron(s) in O22− is .......
[31 Aug 2021 Shift 2]

According to molecular orbital theory, the number of unpaired electron(s) in O22− is .......
[31 Aug 2021 Shift 2]
Question 101/193
4 / -1

Mark Review

The compound/s which will show significant intermolecular H-bonding is/are

[27 Aug 2021 Shift 2]

The compound/s which will show significant intermolecular H-bonding is/are

[27 Aug 2021 Shift 2]

A
(B) only
(B) only

B
(C) only
(C) only

C
(A) and (B)
(A) and (B)

D
(A),(B) and (C)
(A),(B) and (C)
Question 102/193
4 / -1

Mark Review

The spin-only magnetic moment value of B2+ species is ......... ×10−2‌BM. (Nearest integer)
[Given, √3=1.73 ]
[1 Sep 2021 Shift 2]

The spin-only magnetic moment value of B2+ species is ......... ×10−2‌BM. (Nearest integer)
[Given, √3=1.73 ]
[1 Sep 2021 Shift 2]
Question 103/193
4 / -1

Mark Review

The dipole moments of CCl4,CHCl3 and CH4 are in the order:
[Jan. 07, 2020 (I)]

The dipole moments of CCl4,CHCl3 and CH4 are in the order:
[Jan. 07, 2020 (I)]

A
CHCl3<CH4=CCl4
CHCl3<CH4=CCl4

B
CCl4<CH4<CHCl3
CCl4<CH4<CHCl3

C
CH4<CCl4<CHCl3
CH4<CCl4<CHCl3

D
CH4=CCl4<CHCl3
CH4=CCl4<CHCl3
Question 104/193
4 / -1

Mark Review

If the magnetic moment of a dioxygen species is 1.73B.M, it may be:

[Jan. 09,2020 (I)]

If the magnetic moment of a dioxygen species is 1.73B.M, it may be:

[Jan. 09,2020 (I)]

A
O2− or O2+
O2− or O2+

B
O2 or O2+
O2 or O2+

C
O2 or O2−
O2 or O2−

D
O2,O2− or O2+
O2,O2− or O2+
Question 105/193
4 / -1

Mark Review

The bond order and the magnetic characteristics of CN− are:

[Jan. 07, 2020 (II)]

The bond order and the magnetic characteristics of CN− are:

[Jan. 07, 2020 (II)]

A
2‌
1
2
, diamagnetic
2‌
1
2
, diamagnetic

B
3 , diamagnetic
3 , diamagnetic

C
3 , paramagnetic
3 , paramagnetic

D
2‌
1
2
, paramagnetic
2‌
1
2
, paramagnetic
Question 106/193
4 / -1

Mark Review

The compound that has the largest H−M−H bond angle (M=N,S,C), is
[Sep. 05,2020 (II)]

The compound that has the largest H−M−H bond angle (M=N,S,C), is
[Sep. 05,2020 (II)]

A
H2O
H2O

B
NH3
NH3

C
H2S
H2S

D
CH4
CH4
Question 107/193
4 / -1

Mark Review

The molecule in which hybrid MOs involve only one d-orbital of the central atom is:
[Sep. 04, 2020 (II)]

The molecule in which hybrid MOs involve only one d-orbital of the central atom is:
[Sep. 04, 2020 (II)]

A
[Ni(CN)4]2
[Ni(CN)4]2

B
BrF5
BrF5

C
XeF4
XeF4

D
[CrF6]3−
[CrF6]3−
Question 108/193
4 / -1

Mark Review

If AB4 molecule is a polar molecule, a possible geometry of AB4 is:

[Sep. 02,2020(I)]

If AB4 molecule is a polar molecule, a possible geometry of AB4 is:

[Sep. 02,2020(I)]

A
Square pyramidal
Square pyramidal

B
Tetrahedral
Tetrahedral

C
Rectangular planar
Rectangular planar

D
Squareplanar
Squareplanar
Question 109/193
4 / -1

Mark Review

The shape\/ structure of [XeF5]− and XeO3F2, respectively, are:

[Sep. 02,2020 (II)]

The shape\/ structure of [XeF5]− and XeO3F2, respectively, are:

[Sep. 02,2020 (II)]

A
pentagonal planar and trigonal bipyramidal
pentagonal planar and trigonal bipyramidal

B
octahedral and square pyramidal
octahedral and square pyramidal

C
trigonal bipyramidal and pentagonal planar
trigonal bipyramidal and pentagonal planar

D
trigonal bipyramidal and trigonal bipyramidal
trigonal bipyramidal and trigonal bipyramidal
Question 110/193
4 / -1

Mark Review

The molecular geometry of SF6 is octahedral. What is the geometry of SF4 (including lone pair(s) of electrons, if any)?
[Sep. 02, 2020 (II)]

The molecular geometry of SF6 is octahedral. What is the geometry of SF4 (including lone pair(s) of electrons, if any)?
[Sep. 02, 2020 (II)]

A
Tetrahedral
Tetrahedral

B
Trigonal bipyramidal
Trigonal bipyramidal

C
Pyramidal
Pyramidal

D
Square planar
Square planar
Question 111/193
4 / -1

Mark Review

The potential energy curve for the H2 molecule as a function of internuclear distance is :
[Sep. 05, 2020 (I)]

The potential energy curve for the H2 molecule as a function of internuclear distance is :
[Sep. 05, 2020 (I)]

A

B

C

D
Question 112/193
4 / -1

Mark Review

The structure of PCl5 in the solid state is:

[Sep.05,2020(I)]

The structure of PCl5 in the solid state is:

[Sep.05,2020(I)]

A
tetrahedral [PCl4]+ and octahedral [PCl6]−
tetrahedral [PCl4]+ and octahedral [PCl6]−

B
square planar [PCl4]+ and octahedral [PCl6]−
square planar [PCl4]+ and octahedral [PCl6]−

C
square pyramidal
square pyramidal

D
trigonal bipyramidal
trigonal bipyramidal
Question 113/193
4 / -1

Mark Review

Of the species, NO,NO+,NO2+ and NO−, the one with minimum bond strength is:

[Sep. 03,2020 (I)]

Of the species, NO,NO+,NO2+ and NO−, the one with minimum bond strength is:

[Sep. 03,2020 (I)]

A
NO+
NO+

B
NO
NO

C
NO2+
NO2+

D
NO−
NO−
Question 114/193
4 / -1

Mark Review

Two pi and half sigma bonds are present in:

[Jan. 10,2019(I)]

Two pi and half sigma bonds are present in:

[Jan. 10,2019(I)]

A
O2+
O2+

B
N2
N2

C
O2
O2

D
N2+
N2+
Question 115/193
4 / -1

Mark Review

According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2− ?
[Jan .9,2019(I)]

According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2− ?
[Jan .9,2019(I)]

A
Li2+ is unstable and Li2− is stable
Li2+ is unstable and Li2− is stable

B
Li2+ is stable and Li2− is unstable
Li2+ is stable and Li2− is unstable

C
Both are stable
Both are stable

D
Both are un stable
Both are un stable
Question 116/193
4 / -1

Mark Review

In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?
[Jan. 9, 2019 (II)]

In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?
[Jan. 9, 2019 (II)]

A
NO→NO+
NO→NO+

B
N2→N2+
N2→N2+

C
O2→O2+
O2→O2+

D
O2→O22−
O2→O22−
Question 117/193
4 / -1

Mark Review

The correct statement about ICl5 and ICl4− is :

[April 8, 2019 (II)]

The correct statement about ICl5 and ICl4− is :

[April 8, 2019 (II)]

A
both are is isostructural.

both are is isostructural.

B
ICl5 is trigonal bipyramidal and ICl4− is tetrahedral.

ICl5 is trigonal bipyramidal and ICl4− is tetrahedral.

C
ICl5 is square pyramidal and ICl4− is tetrahedral.

ICl5 is square pyramidal and ICl4− is tetrahedral.

D
ICl5 is square pyramidal and ICl4− is square planar.
ICl5 is square pyramidal and ICl4− is square planar.
Question 118/193
4 / -1

Mark Review

The ion that has sp3d2 hydridisation for the central atom, is:
[April 8, 2019 (II)]

The ion that has sp3d2 hydridisation for the central atom, is:
[April 8, 2019 (II)]

A
[ICl4]−
[ICl4]−

B
[ICl2]−
[ICl2]−

C
[IF6]−
[IF6]−

D
[BrF2]−
[BrF2]−
Question 119/193
4 / -1

Mark Review

During the change of O2 to O2−, the incoming electron goes to the orbital :
[April 10, 2019 (I)]

During the change of O2 to O2−, the incoming electron goes to the orbital :
[April 10, 2019 (I)]

A
π2py
π2py

B
σ*2pz
σ*2pz

C
π*2px
π*2px

D
π2px
π2px
Question 120/193
4 / -1

Mark Review

Among the following, the molecule expected to be stabilised by anion formation is:
C2,O2,NO,F2
[April 9, 2019 (I)]

Among the following, the molecule expected to be stabilised by anion formation is:
C2,O2,NO,F2
[April 9, 2019 (I)]

A
C2
C2

B
F2
F2

C
NO
NO

D
O2
O2
Question 121/193
4 / -1

Mark Review

Among the following molecules/ions, C22−,N22−,O22−,O2 Which one is diamagnetic and has the shortest bond length?
[April 8, 2019(II)]

Among the following molecules/ions, C22−,N22−,O22−,O2 Which one is diamagnetic and has the shortest bond length?
[April 8, 2019(II)]

A
O2
O2

B
N22−
N22−

C
O22−
O22−

D
C22−
C22−
Question 122/193
4 / -1

Mark Review

Which of the following compounds contain(s) no covalent bond(s)? KCl,PH3,O2,B2H6,H2SO4
[2018]

Which of the following compounds contain(s) no covalent bond(s)? KCl,PH3,O2,B2H6,H2SO4
[2018]

A
KCl,B2H6,PH3
KCl,B2H6,PH3

B
KCl,H2SO4
KCl,H2SO4

C
KCl
KCl

D
KCl,B2H6
KCl,B2H6
Question 123/193
4 / -1

Mark Review

Total number of lone pair of electrons in I3 ion is:
[2018]

Total number of lone pair of electrons in I3 ion is:
[2018]

A
3
3

B
6
6

C
9
9

D
12
12
Question 124/193
4 / -1

Mark Review

Which of the following conversions involves change in both shape and hybridisation?
[Online April 16, 2018]

Which of the following conversions involves change in both shape and hybridisation?
[Online April 16, 2018]

A
H2O→H3O+
H2O→H3O+

B
BF3→BF4−
BF3→BF4−

C
CH4→C2H6
CH4→C2H6

D
NH3→NH4+
NH3→NH4+
Question 125/193
4 / -1

Mark Review

The incorrect geometry is represented by
[Online April 16, 2018]

The incorrect geometry is represented by
[Online April 16, 2018]

A
NF3− trigonal planar
NF3− trigonal planar

B
BF3 -trigonal planar
BF3 -trigonal planar

C
AsF ‌5 -trigonal bipyramidal
AsF ‌5 -trigonal bipyramidal

D
H2O− bent
H2O− bent
Question 126/193
4 / -1

Mark Review

Identify the pair in which the geometry of the species is Tshape and square pyramidal, respectively
[Online April 15, 2018(I)]

Identify the pair in which the geometry of the species is Tshape and square pyramidal, respectively
[Online April 15, 2018(I)]

A
ICl2− and ICl5
ICl2− and ICl5

B
IO3− and IO2F2−
IO3− and IO2F2−

C
ClF3 and IO4
ClF3 and IO4

D
XeOF2 and XeOF4
XeOF2 and XeOF4
Question 127/193
4 / -1

Mark Review

The decreasing order of bond angles in BF3,NH3,PF3 and I3− is:

[Online April 15, 2018 (I)]

The decreasing order of bond angles in BF3,NH3,PF3 and I3− is:

[Online April 15, 2018 (I)]

A
I3−>BF3>NH3>PF3
I3−>BF3>NH3>PF3

B
BF3>I3−>PF3>NH3
BF3>I3−>PF3>NH3

C
BF3>NH3>PF3>I3−
BF3>NH3>PF3>I3−

D
I3−>NH3>PF3>BF3
I3−>NH3>PF3>BF3
Question 128/193
4 / -1

Mark Review

According to molecular orbital theory, which of the following will not be a viable molecule?
[2018]

According to molecular orbital theory, which of the following will not be a viable molecule?
[2018]

A
He22+
He22+

B
He2+
He2+

C
H2−
H2−

D
H22−
H22−
Question 129/193
4 / -1

Mark Review

H−N
I
−−−
N
II
−−−
N In hydrogen azide, the bond orders of bonds (I) and (II) are
[Online April 15,2018(I)]

H−N
I
−−−
N
II
−−−
N In hydrogen azide, the bond orders of bonds (I) and (II) are
[Online April 15,2018(I)]

A
I<2,II>2
I<2,II>2

B
I>2,II>2
I>2,II>2

C
I>2, II <2
I>2, II <2

D
I<2,II<2
I<2,II<2
Question 130/193
4 / -1

Mark Review

Which of the following best describes the diagram of molecular orbital?

[Online April 15, 2018 (II)]

Which of the following best describes the diagram of molecular orbital?

[Online April 15, 2018 (II)]

A
A bonding π orbital
A bonding π orbital

B
A non-bonding orbital
A non-bonding orbital

C
An antibonding σ orbital
An antibonding σ orbital

D
An antibonding π orbital
An antibonding π orbital
Question 131/193
4 / -1

Mark Review

In the molecular orbital diagram for the molecular ion, N2+, the number of electrons in the σ2p molecular orbital is:

[Online April 15,2018(I)]

In the molecular orbital diagram for the molecular ion, N2+, the number of electrons in the σ2p molecular orbital is:

[Online April 15,2018(I)]

A
0
0

B
2
2

C
3
3

D
1
1
Question 132/193
4 / -1

Mark Review

sp3d2 Hybridisation is not displayed by:

[Online April 8, 2017]

sp3d2 Hybridisation is not displayed by:

[Online April 8, 2017]

A
BrF5
BrF5

B
SF6
SF6

C
[CrF6]3−
[CrF6]3−

D
PF5
PF5
Question 133/193
4 / -1

Mark Review

The group having triangular planar structures is :

[Online April 9, 2017]

The group having triangular planar structures is :

[Online April 9, 2017]

A
BF3,NF3,CO32−
BF3,NF3,CO32−

B
CO32−,NO3−,SO3
CO32−,NO3−,SO3

C
NH3,SO3,CO32−
NH3,SO3,CO32−

D
NCl3,BCl3,SO3
NCl3,BCl3,SO3
Question 134/193
4 / -1

Mark Review

Which of the following is paramagnetic?
[Online April 8, 2017]

Which of the following is paramagnetic?
[Online April 8, 2017]

A
NO+
NO+

B
CO
CO

C
O22−
O22−

D
B2
B2
Question 135/193
4 / -1

Mark Review

Which of the following species is not paramagnetic?
[2017]

Which of the following species is not paramagnetic?
[2017]

A
NO
NO

B
CO
CO

C
O2
O2

D
B2
B2
Question 136/193
4 / -1

Mark Review

The species in which the N atom is in a state of sp hybridisation is :

[2016]

The species in which the N atom is in a state of sp hybridisation is :

[2016]

A
NO3−
NO3−

B
NO2
NO2

C
NO2+
NO2+

D
NO2−
NO2−
Question 137/193
4 / -1

Mark Review

The group of molecules having identical shape is:

[Online April 9, 2016]

The group of molecules having identical shape is:

[Online April 9, 2016]

A
PCl5,IF5,XeO2F2
PCl5,IF5,XeO2F2

B
BF3,PCl3,XcO3
BF3,PCl3,XcO3

C
SF4,XeF4,CCl4
SF4,XeF4,CCl4

D
ClF3,XeOF2,XeF3+
ClF3,XeOF2,XeF3+
Question 138/193
4 / -1

Mark Review

The bond angle H−X−H is the greatest in the compound:

[Online April 10,2016]

The bond angle H−X−H is the greatest in the compound:

[Online April 10,2016]

A
PH3
PH3

B
CH4
CH4

C
NH3
NH3

D
H2O
H2O
Question 139/193
4 / -1

Mark Review

Which compound exhibits maximum dipole moment among the following ?
[Online April 11, 2015]

Which compound exhibits maximum dipole moment among the following ?
[Online April 11, 2015]

A

B

C

D
Question 140/193
4 / -1

Mark Review

Molecule AB has a bond length of 1.617A and a dipole moment of 0.38D. The fractional charge on each atom (absolute magnitude) is : (e0=4.802×10−10 esu)
[Online April 11, 2015]

Molecule AB has a bond length of 1.617A and a dipole moment of 0.38D. The fractional charge on each atom (absolute magnitude) is : (e0=4.802×10−10 esu)
[Online April 11, 2015]

A
0.5
0.5

B
0.05
0.05

C
0
0

D
1.0
1.0
Question 141/193
4 / -1

Mark Review

After understanding the assertion and reason, choose the correct option.

Assertion : In the bonding molecular orbital (MO) of H2, electron density is increased between the nuclei.
Reason : The bonding MO is ΨA+ΨB, which shows destructive interference of the combining electron waves.
[Online April 10, 2015]

After understanding the assertion and reason, choose the correct option.

Assertion : In the bonding molecular orbital (MO) of H2, electron density is increased between the nuclei.
Reason : The bonding MO is ΨA+ΨB, which shows destructive interference of the combining electron waves.
[Online April 10, 2015]

A
Assertion is incorrect, reason is correct.

Assertion is incorrect, reason is correct.

B
Assertion is correct, reason is incorrect.

Assertion is correct, reason is incorrect.

C
Assertion and reason are correct and reason is the correct explanation for the assertion.

Assertion and reason are correct and reason is the correct explanation for the assertion.

D
Assertion and reason are correct, but reason is not the correct explanation for the assertion.
Assertion and reason are correct, but reason is not the correct explanation for the assertion.
Question 142/193
4 / -1

Mark Review

Amongst LiCl,RbCl,BeCl2 and MgCl2 the compounds with the greatest and the least ionic character, respectively are:

[Online April 19, 2014]

Amongst LiCl,RbCl,BeCl2 and MgCl2 the compounds with the greatest and the least ionic character, respectively are:

[Online April 19, 2014]

A
LiCl and RbCl
LiCl and RbCl

B
RbCl and BeCl2
RbCl and BeCl2

C
MgCl2 and BeCl2
MgCl2 and BeCl2

D
RbCl and MgCl2
RbCl and MgCl2
Question 143/193
4 / -1

Mark Review

Which of these statements is not true?
[Online April 19, 2014]

Which of these statements is not true?
[Online April 19, 2014]

A
NO+ is not isoelectronic with O2
NO+ is not isoelectronic with O2

B
B is always covalent in its compounds
B is always covalent in its compounds

C
In aqueous solution, the Tl+ion is much more stable than Tl+3
In aqueous solution, the Tl+ion is much more stable than Tl+3

D
LiAlH4 is a versatilereducing agent in organic synthesis.
LiAlH4 is a versatilereducing agent in organic synthesis.
Question 144/193
4 / -1

Mark Review

The correct order of bond dissociation energy among N2, O2,O2− is shown in which of the following arrangements?
[Online April 11, 2014]

The correct order of bond dissociation energy among N2, O2,O2− is shown in which of the following arrangements?
[Online April 11, 2014]

A
N2>O2−>O2
N2>O2−>O2

B
O2−>O2>N2
O2−>O2>N2

C
N2>O2>O2−
N2>O2>O2−

D
O2>O2−>N2
O2>O2−>N2
Question 145/193
4 / -1

Mark Review

The number and type of bonds in C22− ion in CaC2 are:

[Online April 9, 2014]

The number and type of bonds in C22− ion in CaC2 are:

[Online April 9, 2014]

A
One σ bond and one π -bond
One σ bond and one π -bond

B
One σ bond and two π -bond
One σ bond and two π -bond

C
Two σ bond and two π -bond
Two σ bond and two π -bond

D
Two σ bond and one π -bond
Two σ bond and one π -bond
Question 146/193
4 / -1

Mark Review

Which of the following molecules has two sigma (σ) and two pi (π) bonds?
[Online April 12, 2014]

Which of the following molecules has two sigma (σ) and two pi (π) bonds?
[Online April 12, 2014]

A
C2H4
C2H4

B
N2F2
N2F2

C
C2H2Cl2
C2H2Cl2

D
HCN
HCN
Question 147/193
4 / -1

Mark Review

Which one of the following properties is not shown by NO?
[2014]

Which one of the following properties is not shown by NO?
[2014]

A
It is diamagnetic in gaseous state
It is diamagnetic in gaseous state

B
It is neutral oxide
It is neutral oxide

C
It combines with oxygen to form nitrogen dioxide
It combines with oxygen to form nitrogen dioxide

D
Its bond order is 2.5
Its bond order is 2.5
Question 148/193
4 / -1

Mark Review

Which one of the following molecules is paramagnetic?
[Online April 19, 2014]

Which one of the following molecules is paramagnetic?
[Online April 19, 2014]

A
N2
N2

B
NO
NO

C
CO
CO

D
O3
O3
Question 149/193
4 / -1

Mark Review

Which of the following has unpaired electron(s)?
[Online April 9, 2014]

Which of the following has unpaired electron(s)?
[Online April 9, 2014]

A
N2
N2

B
O2−
O2−

C
N22+
N22+

D
O22−
O22−
Question 150/193
4 / -1

Mark Review

Which one of the following molecules is polar?
[Online April 9, 2013]

Which one of the following molecules is polar?
[Online April 9, 2013]

A
XeF4
XeF4

B
IF5
IF5

C
SbF5
SbF5

D
CF4
CF4
Question 151/193
4 / -1

Mark Review

Bond distance in HF is 9.17×10−11m. Dipole moment of HF is 6.104×10−30Cm. The percentage ionic character in HF will be : (electron charge =1.60×10−19C )
[Online April 23, 2013]

Bond distance in HF is 9.17×10−11m. Dipole moment of HF is 6.104×10−30Cm. The percentage ionic character in HF will be : (electron charge =1.60×10−19C )
[Online April 23, 2013]

A
61.0%
61.0%

B
38.0%
38.0%

C
35.5%
35.5%

D
41.5%
41.5%
Question 152/193
4 / -1

Mark Review

The shape of IF6− is:

[Online April 23, 2013]

The shape of IF6− is:

[Online April 23, 2013]

A
Trigonally distorted octahedron
Trigonally distorted octahedron

B
Pyramidal
Pyramidal

C
Octahedral
Octahedral

D
Square antiprism
Square antiprism
Question 153/193
4 / -1

Mark Review

In which of the following sets, all the given species are isostructural?
[Online April 25, 2013]

In which of the following sets, all the given species are isostructural?
[Online April 25, 2013]

A
CO2,NO2,ClO2,SiO2
CO2,NO2,ClO2,SiO2

B
PCl3,AlCl3,BCl3,SbCl3
PCl3,AlCl3,BCl3,SbCl3

C
BF3,NF3,PF3,AlF3
BF3,NF3,PF3,AlF3

D
BF4−,CCl4,NH4+,PCl4+
BF4−,CCl4,NH4+,PCl4+
Question 154/193
4 / -1

Mark Review

In which of the following pairs of molecules\/ions, both the species are not likely to exist?
[2013]

In which of the following pairs of molecules\/ions, both the species are not likely to exist?
[2013]

A
H2+,He22−
H2+,He22−

B
H2−,He22−
H2−,He22−

C
H22+,He2
H22+,He2

D
H2−,He22+
H2−,He22+
Question 155/193
4 / -1

Mark Review

Which one of the following molecules is expected to exhibit diamagnetic behaviour?
[2013]

Which one of the following molecules is expected to exhibit diamagnetic behaviour?
[2013]

*This question may have multiple correct answers

A
C2
C2

B
N2
N2

C
O2
O2

D
S2
S2
Question 156/193
4 / -1

Mark Review

Which of the following is the wrong statement
[2013]

Which of the following is the wrong statement
[2013]

*This question may have multiple correct answers

A
ONCl and ONO - are not isoelectronic.

ONCl and ONO - are not isoelectronic.

B
O3 molecule is bent
O3 molecule is bent

C
Ozone is violet-black in solid state
Ozone is violet-black in solid state

D
Ozone is diamagnetic gas.
Ozone is diamagnetic gas.
Question 157/193
4 / -1

Mark Review

Stability of the species Li2,Li2− and Li2+ increases in the order of :
[2013]

Stability of the species Li2,Li2− and Li2+ increases in the order of :
[2013]

A
Li2<Li2+<Li2−
Li2<Li2+<Li2−

B
Li2−<Li2+<Li2
Li2−<Li2+<Li2

C
Li2<Li2−<Li2+
Li2<Li2−<Li2+

D
Li2−<Li2<Li2+
Li2−<Li2<Li2+
Question 158/193
4 / -1

Mark Review

In which of the following ionization processes the bond energy has increased and also the magnetic behaviour has changed from paramagnetic to diamagnetic?
[Online April 9, 2013]

In which of the following ionization processes the bond energy has increased and also the magnetic behaviour has changed from paramagnetic to diamagnetic?
[Online April 9, 2013]

A
NO→NO+
NO→NO+

B
N2→N2+
N2→N2+

C
C2→C2+
C2→C2+

D
O2→O2‌+
O2→O2‌+
Question 159/193
4 / -1

Mark Review

Bond order normally gives idea of stability of a molecular species. All the molecules viz. H2,Li2 and B2 have the same bond order yet they are not equally stable. Their stability order is
[Online April 22, 2013]

Bond order normally gives idea of stability of a molecular species. All the molecules viz. H2,Li2 and B2 have the same bond order yet they are not equally stable. Their stability order is
[Online April 22, 2013]

A
H2>B2>Li2
H2>B2>Li2

B
Li2>H2>B2
Li2>H2>B2

C
Li2>B2>H2
Li2>B2>H2

D
B2>H2>Li2
B2>H2>Li2

E
None of above
None of above
Question 160/193
4 / -1

Mark Review

The internuclear distances in O−O bonds for O2+,O2,O2− and O22− respectively are:
[Online April 25, 2013]

The internuclear distances in O−O bonds for O2+,O2,O2− and O22− respectively are:
[Online April 25, 2013]

A
1.30
o
A
,1.49
o
A
,1.12
o
A
,1.21
o
A
1.30
o
A
,1.49
o
A
,1.12
o
A
,1.21
o
A

B
1.49
o
A
,1.21
o
A
,1.12
o
A
,1.30
o
A
1.49
o
A
,1.21
o
A
,1.12
o
A
,1.30
o
A

C
1.21
o
A
,1.12
o
A
,1.49
o
A
,1.30
o
A
1.21
o
A
,1.12
o
A
,1.49
o
A
,1.30
o
A

D
1.12
o
A
,1.21
o
A
,1.30
o
A
,1.49
o
A
1.12
o
A
,1.21
o
A
,1.30
o
A
,1.49
o
A
Question 161/193
4 / -1

Mark Review

ortho-Nitrophenol is less soluble in water than p - and m - nitrophenols because :

[2012]

ortho-Nitrophenol is less soluble in water than p - and m - nitrophenols because :

[2012]

A
o -nitrophenol is more volatile steam than those of m and p -isomers.

o -nitrophenol is more volatile steam than those of m and p -isomers.

B
o -nitrophenol shows intramolecular H-bonding
o -nitrophenol shows intramolecular H-bonding

C
o-nitrophenol shows intermolecular H-bonding
o-nitrophenol shows intermolecular H-bonding

D
Melting point of o -nitrophenol is lower than those of m - and p -isomers.
Melting point of o -nitrophenol is lower than those of m - and p -isomers.
Question 162/193
4 / -1

Mark Review

Among the following, the species having the smallest bond length is
[Online May 7,2012]

Among the following, the species having the smallest bond length is
[Online May 7,2012]

A
NO−
NO−

B
NO+
NO+

C
O2
O2

D
NO
NO
Question 163/193
4 / -1

Mark Review

Among the following chloro-compound having the lowest dipole moment is
[Online May 12, 2012]

Among the following chloro-compound having the lowest dipole moment is
[Online May 12, 2012]

A
CH3Cl
CH3Cl

B

C
CH2Cl2
CH2Cl2

D
Question 164/193
4 / -1

Mark Review

Although CN− ion and N2 molecule are isoelectronic, yet N2 molecule is chemically inert because of
[Online May 12, 2012]

Although CN− ion and N2 molecule are isoelectronic, yet N2 molecule is chemically inert because of
[Online May 12, 2012]

A
presence of more number of electrons in bonding orbitals
presence of more number of electrons in bonding orbitals

B
low bond energy
low bond energy

C
absence of bond polarity
absence of bond polarity

D
uneven electron distribution.
uneven electron distribution.
Question 165/193
4 / -1

Mark Review

In which of the following pairs, the two species are not isostructural ?
[2012]

In which of the following pairs, the two species are not isostructural ?
[2012]

A
CO32− and NO3−
CO32− and NO3−

B
PCl4+ and SiCl4
PCl4+ and SiCl4

C
PF5 and BrF5
PF5 and BrF5

D
AlF63− and SF6
AlF63− and SF6
Question 166/193
4 / -1

Mark Review

The formation of molecular complex BF3−NH3 results in a change in hybridisation of boron
[Online May 12, 2012]

The formation of molecular complex BF3−NH3 results in a change in hybridisation of boron
[Online May 12, 2012]

A
from sp2 to dsp2
from sp2 to dsp2

B
from sp2 to sp3
from sp2 to sp3

C
from sp3 to sp2
from sp3 to sp2

D
from sp3 to sp3d
from sp3 to sp3d
Question 167/193
4 / -1

Mark Review

Which of the following has the square planar structure?
[Online May 19, 2012]

Which of the following has the square planar structure?
[Online May 19, 2012]

A
XeF4
XeF4

B
NH4+
NH4+

C
BF4−
BF4−

D
CCl4
CCl4
Question 168/193
4 / -1

Mark Review

Among the following species which two have trigonal bipyramidal shape?

(I) NI3
(II) I3−
(III) SO32−
(IV) NO3−
[Online May 26, 2012]

Among the following species which two have trigonal bipyramidal shape?

(I) NI3
(II) I3−
(III) SO32−
(IV) NO3−
[Online May 26, 2012]

A
I and III
I and III

B
III and IV
III and IV

C
I and IV
I and IV

D
II and III
II and III
Question 169/193
4 / -1

Mark Review

The number of types of bonds between two carbon atoms in calcium carbide is :
[2011RS]

The number of types of bonds between two carbon atoms in calcium carbide is :
[2011RS]

A
One sigma, one pi
One sigma, one pi

B
Two sigma, onc pi
Two sigma, onc pi

C
Two sigma, two pi
Two sigma, two pi

D
One sigma, two pi
One sigma, two pi
Question 170/193
4 / -1

Mark Review

Which one of the following pairs of species have the same bond order?
[2008]

Which one of the following pairs of species have the same bond order?
[2008]

A
CN− and NO+
CN− and NO+

B
CN− and CN+
CN− and CN+

C
O−, and CN−
O−, and CN−

D
NO+ and CN+
NO+ and CN+
Question 171/193
4 / -1

Mark Review

The bond dissociation energy of B−F in BF3 is 646kJ mol−1, whereas that of C−F in CF4 is 515kJmol−1. The correct reason for higher B−F bond dissociation energy as compared to that of C−F bond is
[2008]

The bond dissociation energy of B−F in BF3 is 646kJ mol−1, whereas that of C−F in CF4 is 515kJmol−1. The correct reason for higher B−F bond dissociation energy as compared to that of C−F bond is
[2008]

A
stronger σ bond between B and F in BF3 as compared to that between C and F in CF4.

stronger σ bond between B and F in BF3 as compared to that between C and F in CF4.

B
significant pπ−pπ interaction between B and F in BF3, whereas there is no possibility of such interaction between C and F in CF4.

significant pπ−pπ interaction between B and F in BF3, whereas there is no possibility of such interaction between C and F in CF4.

C
lower degree of pπ−pπ interaction between B and F in BF3 than that between C and F in CF4.

lower degree of pπ−pπ interaction between B and F in BF3 than that between C and F in CF4.

D
smaller size of B -atom as compared to that of C -atom.
smaller size of B -atom as compared to that of C -atom.
Question 172/193
4 / -1

Mark Review

Using MO theory, predict which of the following species has the shortest bond length?
[2008]

Using MO theory, predict which of the following species has the shortest bond length?
[2008]

A
O2+
O2+

B
O2−
O2−

C
O22−
O22−

D
O22+
O22+
Question 173/193
4 / -1

Mark Review

Which of the following hydrogen bonds is strongest?
[2007]

Which of the following hydrogen bonds is strongest?
[2007]

A
O−H−−−F
O−H−−−F

B
O−H−−−H
O−H−−−H

C
F−H−−−F
F−H−−−F

D
O−H−−−O
O−H−−−O
Question 174/193
4 / -1

Mark Review

The charge\/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, K+,Ca2+,Mg2+,Be2+?
[2007]

The charge\/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, K+,Ca2+,Mg2+,Be2+?
[2007]

A
Ca2+<Mg2+<Be+<K
Ca2+<Mg2+<Be+<K

B
Mg2+<Be2+<K+<Ca2+
Mg2+<Be2+<K+<Ca2+

C
Be2+<K+<Ca2+<Mg2−
Be2+<K+<Ca2+<Mg2−

D
K+<Ca2+<Mg2+<Be2+
K+<Ca2+<Mg2+<Be2+
Question 175/193
4 / -1

Mark Review

Which of the following species exhibits the diamagnetic bchaviour?
[2007]

Which of the following species exhibits the diamagnetic bchaviour?
[2007]

A
NO
NO

B
O22−
O22−

C
O2+
O2+

D
O2
O2
Question 176/193
4 / -1

Mark Review

In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?
[2007]

In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?
[2007]

A
N2→N2‌+
N2→N2‌+

B
C2→C2+
C2→C2+

C
NO→NO+
NO→NO+

D
O2→O2+.
O2→O2+.
Question 177/193
4 / -1

Mark Review

In which of the following molecules\/ions are all the bonds not equal?
[2006]

In which of the following molecules\/ions are all the bonds not equal?
[2006]

A
XeF4
XeF4

B
BF4
BF4

C
SF4
SF4

D
SiF4
SiF4
Question 178/193
4 / -1

Mark Review

The decreasing values of bond angles from NH3(106∘) to SbH3(101∘) down group- 15 of the periodic table is due to
[2006]

The decreasing values of bond angles from NH3(106∘) to SbH3(101∘) down group- 15 of the periodic table is due to
[2006]

A
decreasing lp−bp repulsion
decreasing lp−bp repulsion

B
decreasing electronegativity
decreasing electronegativity

C
increasing bp−bp repulsion
increasing bp−bp repulsion

D
increasing p -orbital character in sp3
increasing p -orbital character in sp3
Question 179/193
4 / -1

Mark Review

Which of the following molecules/ions does not contain unpaired electrons?
[2006]

Which of the following molecules/ions does not contain unpaired electrons?
[2006]

A
N2+
N2+

B
O2
O2

C
O22−
O22−

D
B2
B2
Question 180/193
4 / -1

Mark Review

Lattice energy of an ionic compound depends upon
[2005]

Lattice energy of an ionic compound depends upon
[2005]

A
Charge on the ion and size of the ion
Charge on the ion and size of the ion

B
Packing of ions only
Packing of ions only

C
Size of the ion only
Size of the ion only

D
Charge on the ion only
Charge on the ion only
Question 181/193
4 / -1

Mark Review

Which of the following species is diamagnetic in nature?
[2005]

Which of the following species is diamagnetic in nature?
[2005]

A
H2−
H2−

B
H2+
H2+

C
H2
H2

D
He2+
He2+
Question 182/193
4 / -1

Mark Review

The bond order in NO is 2.5 while that in NO+ is 3 . Which of the following statements is true for these two species?
[2004]

The bond order in NO is 2.5 while that in NO+ is 3 . Which of the following statements is true for these two species?
[2004]

A
Bond length in NO+ is equal to that in NO
Bond length in NO+ is equal to that in NO

B
Bond length in NO is greater than in NO+
Bond length in NO is greater than in NO+

C
Bond length in NO+ is greater than in NO
Bond length in NO+ is greater than in NO

D
Bond length is unpredictable
Bond length is unpredictable
Question 183/193
4 / -1

Mark Review

The correct order of bond angles (smallest first) in H2S, NH3,BF3 and SiH4 is
[2004]

The correct order of bond angles (smallest first) in H2S, NH3,BF3 and SiH4 is
[2004]

A
H2S<NH3<SiH4<BF3
H2S<NH3<SiH4<BF3

B
NH3<H2S<SiH4<BF3
NH3<H2S<SiH4<BF3

C
H2S<SiH4<NH3<BF3
H2S<SiH4<NH3<BF3

D
H2S<NH3<BF3<SiH4
H2S<NH3<BF3<SiH4
Question 184/193
4 / -1

Mark Review

The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively
[2004]

The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively
[2004]

A
sp3 and sp2
sp3 and sp2

B
sp2 and sp3
sp2 and sp3

C
sp2 and sp2
sp2 and sp2

D
sp3 and sp3
sp3 and sp3
Question 185/193
4 / -1

Mark Review

Which one of the following has the regular tetrahedral structure?
(Atomic nos. : B=5,S=16,Ni=28,Xe=54 )
[2004]

Which one of the following has the regular tetrahedral structure?
(Atomic nos. : B=5,S=16,Ni=28,Xe=54 )
[2004]

A
BF4−
BF4−

B
SF4
SF4

C
XeF4
XeF4

D
[Ni(CN)4]2−
[Ni(CN)4]2−
Question 186/193
4 / -1

Mark Review

The maximum number of 90∘ angles between bond pair bond pair of electrons is observed in
[2004]

The maximum number of 90∘ angles between bond pair bond pair of electrons is observed in
[2004]

A
dsp2 hybridization
dsp2 hybridization

B
sp3d hybridization
sp3d hybridization

C
dsp3 hybridization
dsp3 hybridization

D
sp3d2 hybridization
sp3d2 hybridization
Question 187/193
4 / -1

Mark Review

An ether is more volatile than an alcohol having the same molecular formula. This is due to
[2003]

An ether is more volatile than an alcohol having the same molecular formula. This is due to
[2003]

A
alcohols having resonance structures
alcohols having resonance structures

B
intermolecular hydrogen bonding in ethers
intermolecular hydrogen bonding in ethers

C
intermolecular hydrogen bonding in alcohols
intermolecular hydrogen bonding in alcohols

D
dipolar character of ethers
dipolar character of ethers
Question 188/193
4 / -1

Mark Review

Which one of the following pairs of molecules will have permanent dipole moments for both members?
[2003]

Which one of the following pairs of molecules will have permanent dipole moments for both members?
[2003]

A
NO2 and CO2
NO2 and CO2

B
NO2 and O3
NO2 and O3

C
SiF4 and CO2
SiF4 and CO2

D
SiF4 and NO2
SiF4 and NO2
Question 189/193
4 / -1

Mark Review

Which one of the following compounds has the smallest bond angle in its molecule ?
[2003]

Which one of the following compounds has the smallest bond angle in its molecule ?
[2003]

A
OH2
OH2

B
SH2
SH2

C
NH3
NH3

D
SO2
SO2
Question 190/193
4 / -1

Mark Review

The pair of species having identical shapes for molecules of both species is
[2003]

The pair of species having identical shapes for molecules of both species is
[2003]

A
XeF2,CO2
XeF2,CO2

B
BF3,PCl3
BF3,PCl3

C
PF5,IF5
PF5,IF5

D
CF4,SF4
CF4,SF4
Question 191/193
4 / -1

Mark Review

In which of the following species the interatomic bond angle is 109∘28" ?
[2002]

In which of the following species the interatomic bond angle is 109∘28" ?
[2002]

A
NH3,BF4−
NH3,BF4−

B
NH4+,BF3
NH4+,BF3

C
NH3,BF4
NH3,BF4

D
NH2−,BF3.
NH2−,BF3.
Question 192/193
4 / -1

Mark Review

Hybridisation of the underline atom changes in:
[2002]

Hybridisation of the underline atom changes in:
[2002]

A
AlH3 changes to AlH4−
AlH3 changes to AlH4−

B
H2xO changes to H3O+
H2xO changes to H3O+

C
NH3 changes to NH4+
NH3 changes to NH4+

D
in all cases
in all cases
Question 193/193
4 / -1

Mark Review

Which of the following are arranged in an increasing order of their bond strength?
[2002]

Which of the following are arranged in an increasing order of their bond strength?
[2002]

A
O2−<O2<O2+<O22−
O2−<O2<O2+<O22−

B
O22−<O2−<O2<O2+
O22−<O2−<O2<O2+

C
O2−<O22−<O2<O2+
O2−<O22−<O2<O2+

D
O2+<O2<O2−<O22−
O2+<O2<O2−<O22−

List-I Molecule	List-II Shape
(A) BrF₅	(I) T-shape
(B) H₂O	(II) See saw
(C) ClF₃	(III) Bent
(D) SF₄	(IV) Square pyramidal

Question 1/193

CCl4

CCl4

CO2

CO2

CH2 = CH2

CH2 = CH2

CHCl3

CHCl3

Question 2/193

Question 3/193

Question 4/193

Question 5/193

Question 6/193

Question 7/193

Question 8/193

(A)-I, (B)-II, (C)-IV, (D)-III

(A)-I, (B)-II, (C)-IV, (D)-III

(A) -II, (B)-I, (C)-III, (D)-IV

(A) -II, (B)-I, (C)-III, (D)-IV

(A)-III, (B)-IV, (C)-I, (D)-II

(A)-III, (B)-IV, (C)-I, (D)-II

(A)-IV, (B)-III, (C)-I, (D)-II

(A)-IV, (B)-III, (C)-I, (D)-II

Question 9/193

Question 10/193

Statement I is true but Statement II is false.

Statement I is true but Statement II is false.

Both Statement I and Statement II are false.

Both Statement I and Statement II are false.

Both statement I and Statement II is are true.

Both statement I and Statement II is are true.

Statement I is false but Statement II is are true.

Statement I is false but Statement II is are true.

Question 11/193

A, B, C only

A, B, C only

A and C only

A and C only

B, C, D only

B, C, D only

B and D only

B and D only

Question 12/193

Question 13/193

BaCl2

BaCl2

AgCl

AgCl

KCl

KCl

CoCl2

CoCl2

Question 14/193

Question 15/193

Question 16/193

Both (A) and (R) are correct and (R) is not the correct explanation of (A)

Both (A) and (R) are correct and (R) is not the correct explanation of (A)

(A) is not correct but (R) is correct

(A) is not correct but (R) is correct

Both (A) and (R) are correct but (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is correct but (R) is not correct

Question 17/193

Question 18/193

Both Statement I and Statement II are false

Both Statement I and Statement II are false

Both Statement I and Statement II are true

Both Statement I and Statement II are true

Statement I is false but Statement II is true

Statement I is false but Statement II is true

Statement I is true but Statement II is false

Statement I is true but Statement II is false

Question 19/193

H2O

H2O

NH3

NH3

C2H5OH

CCl₄

CCl₄

CO₂

CO₂

CH₂ = CH₂

CH₂ = CH₂

CHCl₃

CHCl₃

BaCl₂

BaCl₂

CoCl₂

CoCl₂

H₂O

H₂O

NH₃

NH₃

C₂H₅OH

C₂H₅OH