Mocktest

3. Classification of Elements and Periodicity in Properties

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Question 1/107
4 / -1

Mark Review

Inert gases have positive electron gain enthalpy. Its correct order is

[25-Jan-2023 Shift 1]

Inert gases have positive electron gain enthalpy. Its correct order is

[25-Jan-2023 Shift 1]

A
Xe<Kr<Ne<He
Xe<Kr<Ne<He

B
He<Ne<Kr<Xe
He<Ne<Kr<Xe

C
He<Xe<Kr<Ne
He<Xe<Kr<Ne

D
He<Kr<Xe<Ne
He<Kr<Xe<Ne
Question 2/107
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Mark Review

Which of the following represents the correct order of metallic character of the given elements?

[25-Jan-2023 Shift 2]

Which of the following represents the correct order of metallic character of the given elements?

[25-Jan-2023 Shift 2]

A
Si<Be<Mg<K
Si<Be<Mg<K

B
Be<Si<Mg<K
Be<Si<Mg<K

C
K<Mg<Be<Si
K<Mg<Be<Si

D
Be< Si <K<Mg
Be< Si <K<Mg
Question 3/107
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Mark Review

The bond dissociation energy is highest for

[29-Jan-2023 Shift 1]

The bond dissociation energy is highest for

[29-Jan-2023 Shift 1]

A
Cl2
Cl2

B
I2
I2

C
Br2
Br2

D
F2
F2
Question 4/107
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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 - IV, C - I, D - III
A - II, B - IV, C - I, D - III

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

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

D
A - IV, B - II, C - I, D - III
A - IV, B - II, C - I, D - III
Question 5/107
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Mark Review

The correct increasing order of the ionic radii is

[31-Jan-2023 Shift 1]

The correct increasing order of the ionic radii is

[31-Jan-2023 Shift 1]

A
Cl−<Ca2+<K+<S2−
Cl−<Ca2+<K+<S2−

B
K+<S2−<Ca2+<Cl−
K+<S2−<Ca2+<Cl−

C
S2−<Cl−<Ca2+<K+
S2−<Cl−<Ca2+<K+

D
Ca2+<K+<Cl−<S2−
Ca2+<K+<Cl−<S2−
Question 6/107
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Mark Review

Nd2+= _______

[31-Jan-2023 Shift 1]

Nd2+= _______

[31-Jan-2023 Shift 1]

A
4f26 s2
4f26 s2

B
4f4
4f4

C
4f3
4f3

D
4f46s2
4f46s2
Question 7/107
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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) : The first ionization enthalpy of 3d series elements is more than that of group 2 metals
Reason (R): In 3d series of elements successive filling of d-orbitals takes place.
In the light of the above statements, choose the correct answer from the options given below :

[31-Jan-2023 Shift 2]

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A) : The first ionization enthalpy of 3d series elements is more than that of group 2 metals
Reason (R): In 3d series of elements successive filling of d-orbitals takes place.
In the light of the above statements, choose the correct answer from the options given below :

[31-Jan-2023 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 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 8/107
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Mark Review

Which of the following elements have half-filled f-orbitals in their ground state?
(Given : atomic number
Sm=62;Eu=63;Tb=65;Gd=64,Pm=61‌ ) ‌
A. Sm
B. Eu
C. Tb
D. Gd
E. Pm
Choose the correct answer from the options given below:

[31-Jan-2023 Shift 2]

Which of the following elements have half-filled f-orbitals in their ground state?
(Given : atomic number
Sm=62;Eu=63;Tb=65;Gd=64,Pm=61‌ ) ‌
A. Sm
B. Eu
C. Tb
D. Gd
E. Pm
Choose the correct answer from the options given below:

[31-Jan-2023 Shift 2]

A
B and D only
B and D only

B
A and E only
A and E only

C
A and B only
A and B only

D
C and D only
C and D only
Question 9/107
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Mark Review

For electron gain enthalpies of the elements denoted as ∆egH, the incorrect option is :

[1-Feb-2023 Shift 2]

For electron gain enthalpies of the elements denoted as ∆egH, the incorrect option is :

[1-Feb-2023 Shift 2]

A
∆egH(Cl)<∆egH (F)
∆egH(Cl)<∆egH (F)

B
∆egH(Se)<∆egH(S)
∆egH(Se)<∆egH(S)

C
∆egH (I) <∆egH (At)
∆egH (I) <∆egH (At)

D
∆egH(Te)<∆egH(Po)
∆egH(Te)<∆egH(Po)
Question 10/107
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Mark Review

Which one of the following elements will remain as liquid inside pure boiling water ?

[6-Apr-2023 shift 2]

Which one of the following elements will remain as liquid inside pure boiling water ?

[6-Apr-2023 shift 2]

A
Cs
Cs

B
Ga
Ga

C
Li
Li

D
Br
Br
Question 11/107
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Mark Review

Group-13 elements react with O2 in amorphous form to form oxides of type M2O3 ( M= element). Which among the following is the most basic oxide?

[6-Apr-2023 shift 2]

Group-13 elements react with O2 in amorphous form to form oxides of type M2O3 ( M= element). Which among the following is the most basic oxide?

[6-Apr-2023 shift 2]

A
Al2O3
Al2O3

B
Ga2O3
Ga2O3

C
Tl2O3
Tl2O3

D
B2O3
B2O3
Question 12/107
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Mark Review

The correct order of electronegativity for given elements is:

[8-Apr-2023 shift 1]

The correct order of electronegativity for given elements is:

[8-Apr-2023 shift 1]

A
P>Br>C>At
P>Br>C>At

B
C>P>At>Br
C>P>At>Br

C
Br>P>At>C
Br>P>At>C

D
Br>C>At>P
Br>C>At>P
Question 13/107
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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 : The energy required to form Mg2+ from Mg is much higher than that required to produce Mg+
Reason R: Mg2+ is small ion and carry more charge than Mg+
In the light of the above statements, choose the correct answer from the options given below.

[10-Apr-2023 shift 2]

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : The energy required to form Mg2+ from Mg is much higher than that required to produce Mg+
Reason R: Mg2+ is small ion and carry more charge than Mg+
In the light of the above statements, choose the correct answer from the options given below.

[10-Apr-2023 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
A is true but R is false
A is true but R is false

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

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 14/107
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Mark Review

The correct order of metallic character is =

[10-Apr-2023 shift 2]

The correct order of metallic character is =

[10-Apr-2023 shift 2]

A
K>Be>Ca
K>Be>Ca

B
Be>Ca>K
Be>Ca>K

C
K>Ca>Be
K>Ca>Be

D
Ca>K>Be
Ca>K>Be
Question 15/107
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Mark Review

For compound having the formula GaAlCl4, the correct option form the following is

[11-Apr-2023 shift 1]

For compound having the formula GaAlCl4, the correct option form the following is

[11-Apr-2023 shift 1]

A
Cl forms bond with both Al and Ga in GaAlCl4
Cl forms bond with both Al and Ga in GaAlCl4

B
Ga is coordinated with Cl in GaAlCl4
Ga is coordinated with Cl in GaAlCl4

C
Ga is more electronegative than Al and is present as a cationic part of the salt
Ga is more electronegative than Al and is present as a cationic part of the salt

D
Oxidation state of Ga in the salt GaAlCl4 is +3
Oxidation state of Ga in the salt GaAlCl4 is +3
Question 16/107
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Mark Review

For elements B, C, N, Li, Be, O and F, the correct order of first ionization enthalpy is

[11-Apr-2023 shift 1]

For elements B, C, N, Li, Be, O and F, the correct order of first ionization enthalpy is

[11-Apr-2023 shift 1]

A
B > Li > Be > C > N > O > F
B > Li > Be > C > N > O > F

B
Li<Be<B<C<N<O<F
Li<Be<B<C<N<O<F

C
Li<Be<B<C<O<N< F
Li<Be<B<C<O<N< F

D
Li< B < Be < C < O < N < F
Li< B < Be < C < O < N < F
Question 17/107
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Mark Review

Which of the following statements are not correct?
A. The electron gain enthalpy of F is more negative than that of Cl.
B. Ionization enthalpy decreases in a group of periodic table.
C. The electronegativity of an atom depends upon the atoms bonded to it.
D. Al2O3 and NO are examples of amphoteric oxides.
Choose the most appropriate answer from the options given below :

[13-Apr-2023 shift 1]

Which of the following statements are not correct?
A. The electron gain enthalpy of F is more negative than that of Cl.
B. Ionization enthalpy decreases in a group of periodic table.
C. The electronegativity of an atom depends upon the atoms bonded to it.
D. Al2O3 and NO are examples of amphoteric oxides.
Choose the most appropriate answer from the options given below :

[13-Apr-2023 shift 1]

A
A, C and D Only
A, C and D Only

B
B and D Only
B and D Only

C
A, B and D Only
A, B and D Only

D
A, B, C and D
A, B, C and D
Question 18/107
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Mark Review

Identify the correct order of standard enthalpy of formation of sodium halides.

[13-Apr-2023 shift 2]

Identify the correct order of standard enthalpy of formation of sodium halides.

[13-Apr-2023 shift 2]

A
NaI<NaBr<NaF<NaCl
NaI<NaBr<NaF<NaCl

B
NaF<NaCl<NaBr<Nal
NaF<NaCl<NaBr<Nal

C
NaCl<NaF<NaBr<Nal
NaCl<NaF<NaBr<Nal

D
Nal<NaBr<NaCl<NaF
Nal<NaBr<NaCl<NaF
Question 19/107
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Mark Review

The number of molecules from the following which contain only two lone pair of electrons is ________
H2O,N2,CO,XeF4,NH3,NO,CO2,F2
[10-Apr-2023 shift 2]

The number of molecules from the following which contain only two lone pair of electrons is ________
H2O,N2,CO,XeF4,NH3,NO,CO2,F2
[10-Apr-2023 shift 2]
Question 20/107
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Mark Review

Metals generally melt at very high temperature. Amongst the following, the metal with the highest melting point will be

[24-Jun-2022-Shift-2]

Metals generally melt at very high temperature. Amongst the following, the metal with the highest melting point will be

[24-Jun-2022-Shift-2]

A
Hg
Hg

B
Ag
Ag

C
Ga
Ga

D
Cs
Cs
Question 21/107
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Mark Review

The correct order of electron gain enthalpies of Cl,F, Te and Po is

[25-Jun-2022-Shift-2]

The correct order of electron gain enthalpies of Cl,F, Te and Po is

[25-Jun-2022-Shift-2]

A
F<Cl<Te<Po
F<Cl<Te<Po

B
Po<Te<F<Cl
Po<Te<F<Cl

C
Te<Po<Cl<F
Te<Po<Cl<F

D
Cl<F<Te<Po
Cl<F<Te<Po
Question 22/107
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Mark Review

Which of the following elements is considered as a metalloid?

[26-Jun-2022-Shift-2]

Which of the following elements is considered as a metalloid?

[26-Jun-2022-Shift-2]

A
Sc
Sc

B
Pb
Pb

C
Bi
Bi

D
Te
Te
Question 23/107
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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) : The ionic radii of O2− and Mg2+ are same.
Reason (R): Both O2− and Mg2+ are isoelectronic species.
In the light of the above statements, choose the correct answer from the options given below.

[27-Jun-2022-Shift-1]

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The ionic radii of O2− and Mg2+ are same.
Reason (R): Both O2− and Mg2+ are isoelectronic species.
In the light of the above statements, choose the correct answer from the options given below.

[27-Jun-2022-Shift-1]

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 24/107
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Mark Review

The correct order of increasing ionic radii is

[27-Jun-2022-Shift-2]

The correct order of increasing ionic radii is

[27-Jun-2022-Shift-2]

A
Mg2+<Na+<F−<O2−<N3−
Mg2+<Na+<F−<O2−<N3−

B
N3−<O2−<F−<Na+<Mg2+
N3−<O2−<F−<Na+<Mg2+

C
F−<Na+<O2−<Mg2+<N3−
F−<Na+<O2−<Mg2+<N3−

D
Na+<F−<Mg2+<O2−<N3−
Na+<F−<Mg2+<O2−<N3−
Question 25/107
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Mark Review

Element "E" belongs to the period 4 and group 16 of the periodic table. The valence shell electron configuration of the element, which is just above "E" in the group is

[28-Jun-2022-Shift-1]

Element "E" belongs to the period 4 and group 16 of the periodic table. The valence shell electron configuration of the element, which is just above "E" in the group is

[28-Jun-2022-Shift-1]

A
3s2,3p4
3s2,3p4

B
3d10,4s2,4p4
3d10,4s2,4p4

C
4d10,5s2,5p4
4d10,5s2,5p4

D
2s2,2p4
2s2,2p4
Question 26/107
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Mark Review

Choose the correct answer from the options given below:

[28-Jun-2022-Shift-2]

Choose the correct answer from the options given below:

[28-Jun-2022-Shift-2]

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

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

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

D
(A)−(I),(B)−(II),(C)−(III),(D)−(IV)
(A)−(I),(B)−(II),(C)−(III),(D)−(IV)
Question 27/107
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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 : The first ionization enthalpy for oxygen is lower than that of nitrogen.
Reason R : The four electrons in 2p orbitals of oxygen experience more electron-electron repulsion.
In the light of the above statements, choose the correct answer from the options given below.

[29-Jun-2022-Shift-2]

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The first ionization enthalpy for oxygen is lower than that of nitrogen.
Reason R : The four electrons in 2p orbitals of oxygen experience more electron-electron repulsion.
In the light of the above statements, choose the correct answer from the options given below.

[29-Jun-2022-Shift-2]

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

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

C
A is correct but R is not correct.
A is correct but R is not correct.

D
A is not correct but R is correct.
A is not correct but R is correct.
Question 28/107
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Mark Review

The IUPAC nomenclature of an element with electronic configuration [Rn]5f146d17s2 is :

[25-Jul-2022-Shift-1]

The IUPAC nomenclature of an element with electronic configuration [Rn]5f146d17s2 is :

[25-Jul-2022-Shift-1]

A
Unnilbium
Unnilbium

B
Unnilunium
Unnilunium

C
Unnilquadium
Unnilquadium

D
Unniltrium
Unniltrium
Question 29/107
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Mark Review

The first ionization enthalpies of Be,B,N and O follow the order

[25-Jul-2022-Shift-2]

The first ionization enthalpies of Be,B,N and O follow the order

[25-Jul-2022-Shift-2]

A
0<N<B<Be
0<N<B<Be

B
Be<B<N<O
Be<B<N<O

C
B<Be<N<O
B<Be<N<O

D
B<Be<O<N
B<Be<O<N
Question 30/107
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Mark Review

Given two statements below :
Statement I : In Cl2 molecule the covalent radius is double of the atomic radius of chlorine.
Statement II : Radius of anionic species is always greater than their parent atomic radius.
Choose the most appropriate answer from options given below :

[26-Jul-2022-Shift-1]

Given two statements below :
Statement I : In Cl2 molecule the covalent radius is double of the atomic radius of chlorine.
Statement II : Radius of anionic species is always greater than their parent atomic radius.
Choose the most appropriate answer from options given below :

[26-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 31/107
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Mark Review

Outermost electronic configurations of four elements A,B,C,D are given below :
(A) 3s2
(B) 3s23p1
(C) 3s23p3
(D) 3s23p4
The correct order of first ionization enthalpy for them is :

[27-Jul-2022-Shift-2]

Outermost electronic configurations of four elements A,B,C,D are given below :
(A) 3s2
(B) 3s23p1
(C) 3s23p3
(D) 3s23p4
The correct order of first ionization enthalpy for them is :

[27-Jul-2022-Shift-2]

A
(A)<(B)<(C)<(D)
(A)<(B)<(C)<(D)

B
(B) < (A) < (D) < (C)
(B) < (A) < (D) < (C)

C
‌‌(B)<(D)<(A)<(C)
‌‌(B)<(D)<(A)<(C)

D
(B)<(A)<(C)<(D)
(B)<(A)<(C)<(D)
Question 32/107
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Mark Review

In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical?
(A) Rb and Cs
(B) Na and K
(C) Ar and Kr
(D) I and At
Choose the correct answer from the options given below:

[28-Jul-2022-Shift-1]

In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical?
(A) Rb and Cs
(B) Na and K
(C) Ar and Kr
(D) I and At
Choose the correct answer from the options given below:

[28-Jul-2022-Shift-1]

A
(A) and (B) only
(A) and (B) only

B
(B) and (C) only
(B) and (C) only

C
(A) and (C) only
(A) and (C) only

D
(C) and (D) only
(C) and (D) only
Question 33/107
4 / -1

Mark Review

The correct decreasing order for metallic character is
[28-Jul-2022-Shift-2]

The correct decreasing order for metallic character is
[28-Jul-2022-Shift-2]

A
Na>Mg>Be>Si>P
Na>Mg>Be>Si>P

B
P>Si>Be>Mg>Na
P>Si>Be>Mg>Na

C
Si>P>Be>Na>Mg
Si>P>Be>Na>Mg

D
Be>Na>Mg>Si>P
Be>Na>Mg>Si>P
Question 34/107
4 / -1

Mark Review

Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?
[29-Jul-2022-Shift-1]

Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?
[29-Jul-2022-Shift-1]

A
BCl3 and SF6
BCl3 and SF6

B
NO and H2SO4
NO and H2SO4

C
SF6 and H2SO4
SF6 and H2SO4

D
BCl3 and NO
BCl3 and NO
Question 35/107
4 / -1

Mark Review

The first ionization enthalpy of Na,Mg and Si, respectively, are : 496, 737 and 786‌kJ‌mol−1. The first ionization enthalpy (kJ‌mol−1) of Al is :

[29-Jul-2022-Shift-1]

The first ionization enthalpy of Na,Mg and Si, respectively, are : 496, 737 and 786‌kJ‌mol−1. The first ionization enthalpy (kJ‌mol−1) of Al is :

[29-Jul-2022-Shift-1]

A
487
487

B
768
768

C
577
577

D
856
856
Question 36/107
4 / -1

Mark Review

Which pair of oxides is acidic in nature?
[26 Feb 2021 Shift 2]

Which pair of oxides is acidic in nature?
[26 Feb 2021 Shift 2]

A
B2O3,CaO
B2O3,CaO

B
B2O3,SiO2
B2O3,SiO2

C
N2O,BaO
N2O,BaO

D
CaO,SiO2
CaO,SiO2
Question 37/107
4 / -1

Mark Review

Match List-I with List-II.

Choose the most appropriate answer from the options given below.
[26 Feb 2021 Shift 1]

Match List-I with List-II.

Choose the most appropriate answer from the options given below.
[26 Feb 2021 Shift 1]

A
(A-ii), (b-iii), (c-iv), (d-i)
(A-ii), (b-iii), (c-iv), (d-i)

B
(A-i), (b-iv), (c-iii), (d-ii)
(A-i), (b-iv), (c-iii), (d-ii)

C
(A-i), (b-iii), (c-iv), (d-ii)
(A-i), (b-iii), (c-iv), (d-ii)

D
(A-iv), (b-i), (c-ii), (d-iii)
(A-iv), (b-i), (c-ii), (d-iii)
Question 38/107
4 / -1

Mark Review

Consider the elements Mg,Al,S,P and Si, the correct increasing order of their first ionization enthalpy is :
[24feb2021shift1]

Consider the elements Mg,Al,S,P and Si, the correct increasing order of their first ionization enthalpy is :
[24feb2021shift1]

A
Mg<Al<Si<S<P
Mg<Al<Si<S<P

B
Al<Mg<Si<S<P
Al<Mg<Si<S<P

C
Mg<Al<Si<P<S
Mg<Al<Si<P<S

D
Al<Mg<S<Si<P
Al<Mg<S<Si<P
Question 39/107
4 / -1

Mark Review

AX is a covalent diatomic molecule, where A and X are second row elements of periodic table. Based on molecular orbital theory, the bond order of AX is 2.5. The total number of electrons in AX is .......... (Round off to the nearest integer).
[18 Mar 2021 Shift 1]

AX is a covalent diatomic molecule, where A and X are second row elements of periodic table. Based on molecular orbital theory, the bond order of AX is 2.5. The total number of electrons in AX is .......... (Round off to the nearest integer).
[18 Mar 2021 Shift 1]
Question 40/107
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Mark Review

The set of elements that differ in mutual relationship from those of the other sets is
[17 Mar 2021 Shift 2]

The set of elements that differ in mutual relationship from those of the other sets is
[17 Mar 2021 Shift 2]

A
Li - Mg
Li - Mg

B
B-Si
B-Si

C
Be - Al
Be - Al

D
Li-Na
Li-Na
Question 41/107
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Mark Review

Identify the elements X and Y using the ionisation energy values given below.

[18 Mar 2021 Shift 1]

Identify the elements X and Y using the ionisation energy values given below.

[18 Mar 2021 Shift 1]

A
X=Na,Y=Mg
X=Na,Y=Mg

B
X=Mg,Y=F
X=Mg,Y=F

C
X=Mg,Y=Na
X=Mg,Y=Na

D
X=F,Y=Mg
X=F,Y=Mg
Question 42/107
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Mark Review

The first ionisation energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z. The elements X,Y and Z, respectively, are
[18 Mar 2021 Shift 2]

The first ionisation energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z. The elements X,Y and Z, respectively, are
[18 Mar 2021 Shift 2]

A
chlorine, lithium and sodium
chlorine, lithium and sodium

B
argon, lithium and sodium
argon, lithium and sodium

C
argon, chlorine and sodium
argon, chlorine and sodium

D
neon, sodium and chlorine
neon, sodium and chlorine
Question 43/107
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Mark Review

Outermost electronic configuration of a group 13 element, E, is 4s2,4p1. The electronic configuration of an element of p-block period-five placed diagonally to element, E is :
[20 Jul 2021 Shift 2]

Outermost electronic configuration of a group 13 element, E, is 4s2,4p1. The electronic configuration of an element of p-block period-five placed diagonally to element, E is :
[20 Jul 2021 Shift 2]

A
[Kr]3d104s24p2
[Kr]3d104s24p2

B
[Ar]3d104s24p2
[Ar]3d104s24p2

C
[Xe]5d106s26p2
[Xe]5d106s26p2

D
[Kr]4d105s25p2
[Kr]4d105s25p2
Question 44/107
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Mark Review

The CORRECT order of first ionisation enthalpy is :

[27 Jul 2021 Shift 2]

The CORRECT order of first ionisation enthalpy is :

[27 Jul 2021 Shift 2]

A
Mg < S < Al < P
Mg < S < Al < P

B
Mg < Al < S < P
Mg < Al < S < P

C
Al < Mg < S < P
Al < Mg < S < P

D
Mg < Al < P < S
Mg < Al < P < S
Question 45/107
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Mark Review

The ionic radii of F−and O2− respectively are 1.33 Å and 1.4Å, while the covalent radius of N is 0.74ÅThe correct statement for the ionic radius of N3−from the following is :
[25 Jul 2021 Shift 2]

The ionic radii of F−and O2− respectively are 1.33 Å and 1.4Å, while the covalent radius of N is 0.74ÅThe correct statement for the ionic radius of N3−from the following is :
[25 Jul 2021 Shift 2]

A
It is smaller than F−and N
It is smaller than F−and N

B
It is bigger than O2− and F−
It is bigger than O2− and F−

C
It is bigger than F−and N, but smaller than of O2−
It is bigger than F−and N, but smaller than of O2−

D
It is smaller than O2− and F−, but bigger than of N
It is smaller than O2− and F−, but bigger than of N
Question 46/107
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Mark Review

The correct order of ionic radii for the ions, P3−,S2−,Ca2+,K+,Cl−is
[27 Aug 2021 Shift 2]

The correct order of ionic radii for the ions, P3−,S2−,Ca2+,K+,Cl−is
[27 Aug 2021 Shift 2]

A
P3−>S2−>Cl−>K+>Ca2+
P3−>S2−>Cl−>K+>Ca2+

B
Cl−>S2−>P3−>Ca2+>K+
Cl−>S2−>P3−>Ca2+>K+

C
P3−>S2−>Cl−>Ca2+>K+
P3−>S2−>Cl−>Ca2+>K+

D
K+>Ca2+>P3−>S2−>Cl−
K+>Ca2+>P3−>S2−>Cl−
Question 47/107
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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) Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below.
[31 Aug 2021 Shift 1]

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below.
[31 Aug 2021 Shift 1]

A
(A) is false but (R) is true.
(A) is false but (R) is true.

B
(A) is true but (R) is false
(A) is true but (R) is false

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

D
Both (A) and (R) are correct but (R) is not the correct explanation of (A).
Both (A) and (R) are correct but (R) is not the correct explanation of (A).
Question 48/107
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Mark Review

Identify the element for which electronic configuration in +3 oxidation state is [Ar] 3d5.
[1 Sep 2021 Shift 2]

Identify the element for which electronic configuration in +3 oxidation state is [Ar] 3d5.
[1 Sep 2021 Shift 2]

A
Ru
Ru

B
Mn
Mn

C
Co
Co

D
Fe
Fe
Question 49/107
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Mark Review

B has a smaller first ionization cnthalpy than Be. Consider the following statements:
(I) it is casier to remove 2p electron than 2s electron
(II) 2p electron of B is more shielded from the nucleus by the inner core of electrons than the 2s electrons of Be
(III) 2s electron has more penetration power than 2p electron (IV) atomic radius of B is more than Be (atomic number B=5,Bc=4 )
The correct statements are:

[Jan. 09,2020 (I)]

B has a smaller first ionization cnthalpy than Be. Consider the following statements:
(I) it is casier to remove 2p electron than 2s electron
(II) 2p electron of B is more shielded from the nucleus by the inner core of electrons than the 2s electrons of Be
(III) 2s electron has more penetration power than 2p electron (IV) atomic radius of B is more than Be (atomic number B=5,Bc=4 )
The correct statements are:

[Jan. 09,2020 (I)]

A
(I), (II) and (IV)
(I), (II) and (IV)

B
(II), (III) and (IV)
(II), (III) and (IV)

C
(I), (II) and (III)
(I), (II) and (III)

D
(I), (III) and (IV)
(I), (III) and (IV)
Question 50/107
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Mark Review

The acidic, basic and amphoteric oxides, respectively, are:

[Jan. 09,2020 (I)]

The acidic, basic and amphoteric oxides, respectively, are:

[Jan. 09,2020 (I)]

A
Na2O,SO3,A2O3
Na2O,SO3,A2O3

B
Cl2O,CaO,P4O10
Cl2O,CaO,P4O10

C
N2O3,Li2O,Al2O3
N2O3,Li2O,Al2O3

D
MgO,Cl2O,Al2O3
MgO,Cl2O,Al2O3
Question 51/107
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Mark Review

The first and second ionisation enthalpies of a metal are 496 and 4560kJmol−1, respectively. How many moles of HCl and H2SO4, respectively, will be needed to react completely with 1 mole of the metal hydroxide?
[NV, Jan. 09,2020(II)]

The first and second ionisation enthalpies of a metal are 496 and 4560kJmol−1, respectively. How many moles of HCl and H2SO4, respectively, will be needed to react completely with 1 mole of the metal hydroxide?
[NV, Jan. 09,2020(II)]

A
1 and 1
1 and 1

B
2 and 0.5
2 and 0.5

C
1 and 2
1 and 2

D
1 and 0.5
1 and 0.5
Question 52/107
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Mark Review

The first ionization energy (in kJ∕mol ) of Na,Mg,Al and Si respectively, are:

[Jan. 08,2020(I)]

The first ionization energy (in kJ∕mol ) of Na,Mg,Al and Si respectively, are:

[Jan. 08,2020(I)]

A
496,737,577,786
496,737,577,786

B
496,577,737,786
496,577,737,786

C
786,737,577,496
786,737,577,496

D
496,577,786,737
496,577,786,737
Question 53/107
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Mark Review

The increasing order of the atomic radii of the following elements is:
(i) C
(ii) O
(iii) F
(iv) Cl
(v) Br
[Jan. 08,2020 (II)]

The increasing order of the atomic radii of the following elements is:
(i) C
(ii) O
(iii) F
(iv) Cl
(v) Br
[Jan. 08,2020 (II)]

A
(ii) <( iii )<(iv)<(i)<(v)
(ii) <( iii )<(iv)<(i)<(v)

B
(iv) <( iii )<( ii )<(i)<(v)
(iv) <( iii )<( ii )<(i)<(v)

C
(iii) <(ii)<(i)<(iv)<(v)
(iii) <(ii)<(i)<(iv)<(v)

D
(i)<(ii)<(iii)<(iv)<(v)
(i)<(ii)<(iii)<(iv)<(v)
Question 54/107
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Mark Review

The electron gain enthalpy (in kJ∕mol ) of fluorine, chlorine, bromine and iodine, respectively, are:
[Jan. 07,2020 (I)]

The electron gain enthalpy (in kJ∕mol ) of fluorine, chlorine, bromine and iodine, respectively, are:
[Jan. 07,2020 (I)]

A
−296,−325,−333 and −349
−296,−325,−333 and −349

B
−349,−333,−325 and −296
−349,−333,−325 and −296

C
−333,−349,−325 and −296
−333,−349,−325 and −296

D
−333,−325,−349 and −296
−333,−325,−349 and −296
Question 55/107
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Mark Review

Within each pair of elements F‌&‌Cl,S‌&‌Se, and Li‌&‌Na, respectively, the elements that release more cnergy upon an electron gain are:

[Jan. 07, 2020 (II)]

Within each pair of elements F‌&‌Cl,S‌&‌Se, and Li‌&‌Na, respectively, the elements that release more cnergy upon an electron gain are:

[Jan. 07, 2020 (II)]

A
Cl, Se and Na
Cl, Se and Na

B
Cl,S and Li
Cl,S and Li

C
F,S and Li
F,S and Li

D
F,Se and Na
F,Se and Na
Question 56/107
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Mark Review

The atomic number of Unnilunium is ________.
[NV,Sep. 06,2020(II)]

The atomic number of Unnilunium is ________.
[NV,Sep. 06,2020(II)]
Question 57/107
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Mark Review

The atomic number of the element unnilennium is:

[Sep. 03,2020 (I)]

The atomic number of the element unnilennium is:

[Sep. 03,2020 (I)]

A
109
109

B
102
102

C
108
108

D
119
119
Question 58/107
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Mark Review

The set that contains atomic numbers of only transition elements, is :
[Sep. 06,2020(I)]

The set that contains atomic numbers of only transition elements, is :
[Sep. 06,2020(I)]

A
37,42,50,64
37,42,50,64

B
21,25,42,72
21,25,42,72

C
9,17,34,38
9,17,34,38

D
21,32,53,64
21,32,53,64
Question 59/107
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Mark Review

The correct order of the ionic radii of O2−,N3−,F−,Mg2+, Na+ and Al3+ is :
[Sep. 05, 2020 (II)]

The correct order of the ionic radii of O2−,N3−,F−,Mg2+, Na+ and Al3+ is :
[Sep. 05, 2020 (II)]

A
N3−<O2−<F−<Na+<Mg2+<Al3+
N3−<O2−<F−<Na+<Mg2+<Al3+

B
Al3+<Na+<Mg2+<O2−<F−<N3−
Al3+<Na+<Mg2+<O2−<F−<N3−

C
Al3+<Mg2+<Na+<F−<O2−<N3−
Al3+<Mg2+<Na+<F−<O2−<N3−

D
N3−<F−<O2−<Mg2+<Na+<Al3+
N3−<F−<O2−<Mg2+<Na+<Al3+
Question 60/107
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Mark Review

The elements with atomic numbers 101 and 104 belong to, respectively:
[Sep .04,2020(I)]

The elements with atomic numbers 101 and 104 belong to, respectively:
[Sep .04,2020(I)]

A
Group 11 and Group 4
Group 11 and Group 4

B
Actinoids and Group 6
Actinoids and Group 6

C
Actinoids and Group 4
Actinoids and Group 4

D
Group 6 and Actinoids
Group 6 and Actinoids
Question 61/107
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Mark Review

The process that is NOT endothermic in nature is:

[Sep. 04, 2020 (II)]

The process that is NOT endothermic in nature is:

[Sep. 04, 2020 (II)]

A
Ar(g)+e−→Ar− (g)
Ar(g)+e−→Ar− (g)

B
H(g)+e−→H−(g)
H(g)+e−→H−(g)

C
O−(g)+e−→O2− (g)
O−(g)+e−→O2− (g)

D
Na(g)→Na+(g)+e−
Na(g)→Na+(g)+e−
Question 62/107
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Mark Review

The ionic radii of O2−,F−,Na+ and Mg2+ are in the order:

[Sep. 04,2020(I)]

The ionic radii of O2−,F−,Na+ and Mg2+ are in the order:

[Sep. 04,2020(I)]

A
F−>O2−>>Na+>Mg2+
F−>O2−>>Na+>Mg2+

B
O2−>F−>Na+>Mg2+
O2−>F−>Na+>Mg2+

C
Mg2+>Na+>F−>O2
Mg2+>Na+>F−>O2

D
O2−>F−>Mg2+>Na+
O2−>F−>Mg2+>Na+
Question 63/107
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Mark Review

Among the statements (I - IV), the correct ones are:

(I) Be has smaller atomic radius compared to Mg.
(II) Be has higher ionization enthalpy than Al.
(III) Charge\/radius ratio of Be is greater than that of Al.
(IV) Both Be and Al form mainly covalent compounds.
[Sep. 03,2020 (II)]

Among the statements (I - IV), the correct ones are:
(I) Be has smaller atomic radius compared to Mg.
(II) Be has higher ionization enthalpy than Al.
(III) Charge\/radius ratio of Be is greater than that of Al.
(IV) Both Be and Al form mainly covalent compounds.
[Sep. 03,2020 (II)]

A
(I), (II) and (IV)
(I), (II) and (IV)

B
(I), (III) and (IV)
(I), (III) and (IV)

C
(II),(III) and(IV)
(II),(III) and(IV)

D
(I), (II) and (III)
(I), (II) and (III)
Question 64/107
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Mark Review

The five successive ionization enthalpies of an element are 800,2427,3658,25024 and 32824kJmol−1. The number of valence electrons in the clement is:
[Sep. 03, 2020 (II)]

The five successive ionization enthalpies of an element are 800,2427,3658,25024 and 32824kJmol−1. The number of valence electrons in the clement is:
[Sep. 03, 2020 (II)]

A
5
5

B
4
4

C
3
3

D
2
2
Question 65/107
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Mark Review

In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is:

[Sep .02,2020(1)]

In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is:

[Sep .02,2020(1)]

A
lonization enthalpy
lonization enthalpy

B
Electronegativity
Electronegativity

C
Electron gain enthalpy
Electron gain enthalpy

D
Atomic radius
Atomic radius
Question 66/107
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Mark Review

Three elements X,Y and Z are in the 3‌nd ‌ period of the periodic table. The oxides of X,Y and Z, respectively, arc basic, amphoteric and acidic. The correct order of the atomic numbers of X, Yand Zis :
[Sep. 02,2020(II)]

Three elements X,Y and Z are in the 3‌nd ‌ period of the periodic table. The oxides of X,Y and Z, respectively, arc basic, amphoteric and acidic. The correct order of the atomic numbers of X, Yand Zis :
[Sep. 02,2020(II)]

A
Z<Y<X
Z<Y<X

B
X<Y<Z
X<Y<Z

C
X<Z<Y
X<Z<Y

D
Y<X<Z
Y<X<Z
Question 67/107
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Mark Review

The element with Z=120 (not yet discovered) will be an\/a:

[Jan. 12,2019 (I)]

The element with Z=120 (not yet discovered) will be an\/a:

[Jan. 12,2019 (I)]

A
Inner-transition metal
Inner-transition metal

B
Alkalineearth metal
Alkalineearth metal

C
Alkalimetal
Alkalimetal

D
Transition metal
Transition metal
Question 68/107
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Mark Review

The correct order of the atomic radii of C,Cs,Al, and S is:

[Jan. 11, 2019 (I)]

The correct order of the atomic radii of C,Cs,Al, and S is:

[Jan. 11, 2019 (I)]

A
C<S<A∣<Cs
C<S<A∣<Cs

B
S<C<Cs<Al
S<C<Cs<Al

C
S<C<Al<Cs
S<C<Al<Cs

D
C<S<Cs<Al
C<S<Cs<Al
Question 69/107
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Mark Review

The correct option with respect to the Pauling electronegativity values of the elements is:
[Jan. 11,2019 (II)]

The correct option with respect to the Pauling electronegativity values of the elements is:
[Jan. 11,2019 (II)]

A
Te>Se
Te>Se

B
Ga<Ge
Ga<Ge

C
Si<Al
Si<Al

D
P>S
P>S
Question 70/107
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Mark Review

The 71‌st ‌ electron of an element X with an atomic number of 71 enters into the orbital:
[Jan.10,2019 (II)]

The 71‌st ‌ electron of an element X with an atomic number of 71 enters into the orbital:
[Jan.10,2019 (II)]

A
6p
6p

B
4f
4f

C
5d
5d

D
65
65
Question 71/107
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Mark Review

In general, the properties that decrease and increase down a group in the periodic table, respectively, are:

[Jan. 9,2019(I)]

In general, the properties that decrease and increase down a group in the periodic table, respectively, are:

[Jan. 9,2019(I)]

A
atomic radius and electronegativity.

atomic radius and electronegativity.

B
electron gain enthalpy and electronegativity.

electron gain enthalpy and electronegativity.

C
electronegativity and atomic radius.

electronegativity and atomic radius.

D
electronegativity and electron gain enthalpy.
electronegativity and electron gain enthalpy.
Question 72/107
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Mark Review

When the first electron gain enthalpy (∆egH) of oxygen is −141kJ∕mol, its second electron gain enthalpy is:

[Jan. 09,2019(II)]

When the first electron gain enthalpy (∆egH) of oxygen is −141kJ∕mol, its second electron gain enthalpy is:

[Jan. 09,2019(II)]

A
a more negative value than the first
a more negative value than the first

B
almost the same as that of the first
almost the same as that of the first

C
negative, but less negative than the first
negative, but less negative than the first

D
a positive value
a positive value
Question 73/107
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Mark Review

The group number, number of valence electrons, and valency of an element with atomic number 15 , respectively, are:

[April 12, 2019 (I)]

The group number, number of valence electrons, and valency of an element with atomic number 15 , respectively, are:

[April 12, 2019 (I)]

A
16,5 and 2
16,5 and 2

B
15,5 and 3
15,5 and 3

C
16,6 and 3
16,6 and 3

D
15,6 and 2
15,6 and 2
Question 74/107
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Mark Review

The IUPAC symbol for the element with atomic number 119 would be :
[April 8, 2019 (II)]

The IUPAC symbol for the element with atomic number 119 would be :
[April 8, 2019 (II)]

A
uue
uue

B
une
une

C
unh
unh

D
uun
uun
Question 75/107
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Mark Review

In comparison to boron, berylium has:

[April 12, 2019 (II)]

In comparison to boron, berylium has:

[April 12, 2019 (II)]

A
lesser nuclear charge and lesser first ionisation enthalpy.

lesser nuclear charge and lesser first ionisation enthalpy.

B
greater nuclear charge and lesser first ionisation enthalpy.

greater nuclear charge and lesser first ionisation enthalpy.

C
greater nulear charge and greater first ionisation enthalpy.

greater nulear charge and greater first ionisation enthalpy.

D
lesser nuclear charge and greater first ionisation enthalpy.
lesser nuclear charge and greater first ionisation enthalpy.
Question 76/107
4 / -1

Mark Review

The element having greatest difference between its first and second ionization energies, is:
[April 9,2019(I)]

The element having greatest difference between its first and second ionization energies, is:
[April 9,2019(I)]

A
Ca
Ca

B
Sc
Sc

C
Ba
Ba

D
K
K
Question 77/107
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Mark Review

The correct order of electron affinity is:

[Online April 15, 2018 (II)]

The correct order of electron affinity is:

[Online April 15, 2018 (II)]

A
O>F>Cl
O>F>Cl

B
F>O>Cl
F>O>Cl

C
F>Cl>O
F>Cl>O

D
Cl>F>O
Cl>F>O
Question 78/107
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Mark Review

For Na+,Mg2+,F− and O2−; the correct order of increasing Ionic radii is :
[Online April 15, 2018(I)]

For Na+,Mg2+,F− and O2−; the correct order of increasing Ionic radii is :
[Online April 15, 2018(I)]

A
O2−<F−<Na+<Mg2+
O2−<F−<Na+<Mg2+

B
Na+<Mg2+<F−<O2−
Na+<Mg2+<F−<O2−

C
Mg2+<Na+<F−<O2
Mg2+<Na+<F−<O2

D
Mg2+<O2−<Na+<F
Mg2+<O2−<Na+<F
Question 79/107
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Mark Review

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect is :
[2017]

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect is :
[2017]

A
Both form basic carbonates
Both form basic carbonates

B
Both form soluble bicarbonates
Both form soluble bicarbonates

C
Both form nitrides
Both form nitrides

D
Nitrates of both Li and Mg yield NO2 and O2 on heating
Nitrates of both Li and Mg yield NO2 and O2 on heating
Question 80/107
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Mark Review

The group having isoelectronic species is :

[2017]

The group having isoelectronic species is :

[2017]

A
O2−,F−,Na+,Mg2+
O2−,F−,Na+,Mg2+

B
O,F−,Na,Mg+
O,F−,Na,Mg+

C
O2−,F−,Na,Mg2+
O2−,F−,Na,Mg2+

D
O−,F−,Na+,Mg2+
O−,F−,Na+,Mg2+
Question 81/107
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Mark Review

Consider the following ionization enthalpies of two elements 'A' and 'B'.

[Online April 8, 2017|

Consider the following ionization enthalpies of two elements 'A' and 'B'.

[Online April 8, 2017|

A
Both 'A' and 'B' belong to group- 1 where ' B ' comes below 'A:

Both 'A' and 'B' belong to group- 1 where ' B ' comes below 'A:

B
Both 'A' and 'B' belong to group- 1 where 'A' comes below 'B'.

Both 'A' and 'B' belong to group- 1 where 'A' comes below 'B'.

C
Both 'A' and 'B' belong to group- 2 where ' B ' comes below 'A?
Both 'A' and 'B' belong to group- 2 where ' B ' comes below 'A?

D
Both 'A' and ' B ' belong to group- 2 where 'A' comes below 'B'.
Both 'A' and ' B ' belong to group- 2 where 'A' comes below 'B'.
Question 82/107
4 / -1

Mark Review

The electronic configuration with the highest ionization enthalpy is:

[Online April 9, 2017]

The electronic configuration with the highest ionization enthalpy is:

[Online April 9, 2017]

A
[Ne] 3s23p′
[Ne] 3s23p′

B
[Ne] 3s23p2
[Ne] 3s23p2

C
[Ne] 3s23p3
[Ne] 3s23p3

D
[Ar]3d104s24p3
[Ar]3d104s24p3
Question 83/107
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Mark Review

Which of the following atoms has the highest first ionization energy?
[2016]

Which of the following atoms has the highest first ionization energy?
[2016]

A
K
K

B
Sc
Sc

C
Rb
Rb

D
Na
Na
Question 84/107
4 / -1

Mark Review

The following statements concern elements in the periodic table. Which of the following is true?
[Online April 10,2016]

The following statements concern elements in the periodic table. Which of the following is true?
[Online April 10,2016]

A
For Group 15 clements, the stability of +5 oxidation state increases down the group
For Group 15 clements, the stability of +5 oxidation state increases down the group

B
Elements of Group 16 have lower ionization enthalpy values compared to those of Group 15 in the corresponding periods.

Elements of Group 16 have lower ionization enthalpy values compared to those of Group 15 in the corresponding periods.

C
The Group 13 elements are all metals
The Group 13 elements are all metals

D
All the elements in Group 17 are gases.
All the elements in Group 17 are gases.
Question 85/107
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Mark Review

The ionic radii (in Å ) of N3−,O2− and F− are respectively:

[2015]

The ionic radii (in Å ) of N3−,O2− and F− are respectively:

[2015]

A
1.71,1.40 and 1.36
1.71,1.40 and 1.36

B
1.71,1.36 and 1.40
1.71,1.36 and 1.40

C
1.36,1.40 and 1.71
1.36,1.40 and 1.71

D
1.36,1.71 and 1.40
1.36,1.71 and 1.40
Question 86/107
4 / -1

Mark Review

In the long form of the periodic table, the valence shell electronic configuration of 5s25p4 corresponds to the element present in:

[Online April 10, 2015]

In the long form of the periodic table, the valence shell electronic configuration of 5s25p4 corresponds to the element present in:

[Online April 10, 2015]

A
Group 16 and period 6
Group 16 and period 6

B
Group 17 and period 6
Group 17 and period 6

C
Group 16 and period 5
Group 16 and period 5

D
Group 17 and period 5
Group 17 and period 5
Question 87/107
4 / -1

Mark Review

Similarity in chemical properties of the atoms of elements in a group of the periodic table is most closely related to:

[Online April 12, 2014]

Similarity in chemical properties of the atoms of elements in a group of the periodic table is most closely related to:

[Online April 12, 2014]

A
atomic numbers
atomic numbers

B
atomic masses
atomic masses

C
number of principal energy levels
number of principal energy levels

D
number of valence electrons
number of valence electrons
Question 88/107
4 / -1

Mark Review

Which of the following series correctly represents relations between the elements from X to Y?

X→Y
[Online April 11,2014]

Which of the following series correctly represents relations between the elements from X to Y?

X→Y
[Online April 11,2014]

A
‌3Li→‌19K Ionization enthalpy increases
‌3Li→‌19K Ionization enthalpy increases

B
‌9F→‌35Br Electron gain enthalpy (negative sign) increases
‌9F→‌35Br Electron gain enthalpy (negative sign) increases

C
‌6C→‌32Ge Atomic radii increases
‌6C→‌32Ge Atomic radii increases

D
18Ar→54Xe Noble character increases
18Ar→54Xe Noble character increases
Question 89/107
4 / -1

Mark Review

Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species O2−,S2−,N3−,P3−?
[Online April 12, 2014]

Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species O2−,S2−,N3−,P3−?
[Online April 12, 2014]

A
O22<N3−<S2−<P3
O22<N3−<S2−<P3

B
O2−<P3−<N3<S2
O2−<P3−<N3<S2

C
N3−<O2−<P3−<S2−
N3−<O2−<P3−<S2−

D
N3−<S2−<O2−<P3−
N3−<S2−<O2−<P3−
Question 90/107
4 / -1

Mark Review

Which one of the following has largest ionic radius?
[Online April 19,2014]

Which one of the following has largest ionic radius?
[Online April 19,2014]

A
Li+
Li+

B
O22−
O22−

C
B3+
B3+

D
F−
F−
Question 91/107
4 / -1

Mark Review

Which of the following represents the correct order of increasing first ionization enthalpy for Ca,Ba,S, Se and Ar ?
[2013]

Which of the following represents the correct order of increasing first ionization enthalpy for Ca,Ba,S, Se and Ar ?
[2013]

A
Ca<S<Ba<Se<Ar
Ca<S<Ba<Se<Ar

B
SSe<Ca<Ba<Ar
SSe<Ca<Ba<Ar

C
Ba<Ca<Se<S<Ar
Ba<Ca<Se<S<Ar

D
Ca<Ba<S<Se<Ar
Ca<Ba<S<Se<Ar
Question 92/107
4 / -1

Mark Review

The order of increasing sizes of atomic radii among the elements O,S, Se and As is:
[Online April 22, 2013]

The order of increasing sizes of atomic radii among the elements O,S, Se and As is:
[Online April 22, 2013]

A
As<S<O<Se
As<S<O<Se

B
Se<S<As<O
Se<S<As<O

C
O<S<As<Se
O<S<As<Se

D
O<S<Se<As
O<S<Se<As
Question 93/107
4 / -1

Mark Review

Which is the correct order of second ionization potential of C,N,O and F in the following?
[Online May 26, 2012; April 23, 2013]

Which is the correct order of second ionization potential of C,N,O and F in the following?
[Online May 26, 2012; April 23, 2013]

A
O>N>F>C
O>N>F>C

B
O>F>N>C
O>F>N>C

C
F>O>N>C
F>O>N>C

D
C>N≥O>F
C>N≥O>F
Question 94/107
4 / -1

Mark Review

The electron affinity of chlorine is 3.7eV.1 gram of chlorine is completely converted to Cl− ion in a gaseous state. (1eV=23.06kcalmol−1) Energy released in the process is
[Online May 7,2012]

The electron affinity of chlorine is 3.7eV.1 gram of chlorine is completely converted to Cl− ion in a gaseous state. (1eV=23.06kcalmol−1) Energy released in the process is
[Online May 7,2012]

A
4.8kcal
4.8kcal

B
7.2kcal
7.2kcal

C
8.2k cal
8.2k cal

D
2.4kcal
2.4kcal
Question 95/107
4 / -1

Mark Review

Which among the following elements has the highest first ionization enthalpy?
[Online May 12, 2012]

Which among the following elements has the highest first ionization enthalpy?
[Online May 12, 2012]

A
Nitrogen
Nitrogen

B
Boron
Boron

C
Carbon
Carbon

D
Oxygen
Oxygen
Question 96/107
4 / -1

Mark Review

The correct order of electron gain enthalpy with negative sign of F,Cl,Br and I, having atomic numbers 9,17,35 and 53 respectively, is:

[2011RS]

The correct order of electron gain enthalpy with negative sign of F,Cl,Br and I, having atomic numbers 9,17,35 and 53 respectively, is:

[2011RS]

A
F>Cl>Br>I
F>Cl>Br>I

B
Cl>F>Br>I
Cl>F>Br>I

C
Br>Cl>I>F
Br>Cl>I>F

D
I>Br>Cl>F
I>Br>Cl>F
Question 97/107
4 / -1

Mark Review

The correct sequence which shows decreasing order of the ionic radii of the elements is
[2010]

The correct sequence which shows decreasing order of the ionic radii of the elements is
[2010]

A
Al3+>Mg2+>Na+>F−>O2−
Al3+>Mg2+>Na+>F−>O2−

B
Na+>Mg2+>Al3+>O2−>F
Na+>Mg2+>Al3+>O2−>F

C
Na+>F−>Mg2+>O2−>Al3+
Na+>F−>Mg2+>O2−>Al3+

D
O2−>F−>Na+>Mg2+>Al3+
O2−>F−>Na+>Mg2+>Al3+
Question 98/107
4 / -1

Mark Review

In which of the following arrangements, the sequence is not strictly according to the property written against it?
[2008, Online May 7,2012 ]

In which of the following arrangements, the sequence is not strictly according to the property written against it?
[2008, Online May 7,2012 ]

A
CO2<SiO2<SnO2<PbO2 : increasing oxidising power
CO2<SiO2<SnO2<PbO2 : increasing oxidising power

B
NH3<PH3<AsH3<SbH3 : increasing basic strength
NH3<PH3<AsH3<SbH3 : increasing basic strength

C
HF<HCl<HBr<HI : increasing acid strength
HF<HCl<HBr<HI : increasing acid strength

D
B<C<O<N : increasing first ionisation enthalpy.
B<C<O<N : increasing first ionisation enthalpy.
Question 99/107
4 / -1

Mark Review

Following statements regarding the periodic trends of chemical reactivityofalkali metals and halogens are given. Which of these statements gives the correct picture?
[2006]

Following statements regarding the periodic trends of chemical reactivityofalkali metals and halogens are given. Which of these statements gives the correct picture?
[2006]

A
Chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens
Chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens

B
In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group
In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group

C
The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group
The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group

D
In both, alkalimetals and halogens chemical reactivity decreases with increase in atomicnumber down the group
In both, alkalimetals and halogens chemical reactivity decreases with increase in atomicnumber down the group
Question 100/107
4 / -1

Mark Review

The increasing order of the first ionization enthalpies of the elements B,P,S and F (Lowest first) is
[2006]

The increasing order of the first ionization enthalpies of the elements B,P,S and F (Lowest first) is
[2006]

A
B≤P<S≤F
B≤P<S≤F

B
B≤S<P<F
B≤S<P<F

C
F<S≤P<B
F<S≤P<B

D
P<S<B<F
P<S<B<F
Question 101/107
4 / -1

Mark Review

Which of the following oxides is amphoteric in character?
[2005]

Which of the following oxides is amphoteric in character?
[2005]

A
SnO2
SnO2

B
SiO2
SiO2

C
CO2
CO2

D
CaO
CaO
Question 102/107
4 / -1

Mark Review

In which of the following arrangements, the order is NOT according to the property indicated against it?
[2005]

In which of the following arrangements, the order is NOT according to the property indicated against it?
[2005]

A
L<Na<K<Rb :
Increasing metallic radius
L<Na<K<Rb :
Increasing metallic radius

B
I<Br<F<Cl:
Increasing electron gain enthalpy (with negative sign)
I<Br<F<Cl:
Increasing electron gain enthalpy (with negative sign)

C
B<C<N<0
Increasing first ionization enthalpy
B<C<N<0
Increasing first ionization enthalpy

D
Al3+<Mg2+<Na+<F−
Increasing ionic size
Al3+<Mg2+<Na+<F−
Increasing ionic size
Question 103/107
4 / -1

Mark Review

Which one of the following ions has the highest value of ionic radius?
[2004]

Which one of the following ions has the highest value of ionic radius?
[2004]

A
O2
O2

B
B3+
B3+

C
Li+
Li+

D
F−
F−
Question 104/107
4 / -1

Mark Review

Among Al2O3,SiO2,P2O3 and SO2 the correct order of acid strength is
[2004]

Among Al2O3,SiO2,P2O3 and SO2 the correct order of acid strength is
[2004]

A
Al2O3<SiO2<SO2<P2O3
Al2O3<SiO2<SO2<P2O3

B
SiO2<SO2<Al2O3<P2O3
SiO2<SO2<Al2O3<P2O3

C
SO2<P2O3<SiO2<Al2O3
SO2<P2O3<SiO2<Al2O3

D
Al2O3<SiO2<P2O3<SO2
Al2O3<SiO2<P2O3<SO2
Question 105/107
4 / -1

Mark Review

The formation of the oxide ion 02−(g) requires first an exothermic and then an endothermic step as shown below
O(g)+e−=O−(g)∆H0=−142kJmol−1

O−(g)+e−=O2−(g)∆H0=844kJmol−1
This is because
[2004]

The formation of the oxide ion 02−(g) requires first an exothermic and then an endothermic step as shown below
O(g)+e−=O−(g)∆H0=−142kJmol−1

O−(g)+e−=O2−(g)∆H0=844kJmol−1
This is because
[2004]

A
O - ion will tend toresist the addition of another electron
O - ion will tend toresist the addition of another electron

B
Oxygen has high electron affinity
Oxygen has high electron affinity

C
Oxygen is more elecronegative
Oxygen is more elecronegative

D
O -ion has comparativelylarger size than oxygen atom
O -ion has comparativelylarger size than oxygen atom
Question 106/107
4 / -1

Mark Review

According to the periodic law of elements, the variation in properties of elements is related to their
[2003]

According to the periodic law of elements, the variation in properties of elements is related to their
[2003]

A
nuclear masses
nuclear masses

B
atomic numbers
atomic numbers

C
nuclear neutron-proton number ratios
nuclear neutron-proton number ratios

D
atomic masses
atomic masses
Question 107/107
4 / -1

Mark Review

Which one of the following is an amphoteric oxide?
[2003]

Which one of the following is an amphoteric oxide?
[2003]

A
Na2O
Na2O

B
SO2
SO2

C
B2O3
B2O3

D
ZnO
ZnO

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