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Solution
Q.10 Correct
Q.10 In-correct
Q.10 Unattempt
When Fe0.93O is heated in presence of oxygen, it converts to Fe2O3 . The number of correct statement/s from the following is___

A. The equivalent weight of Fe0.93O is
Molecular weight
0.79
.

B. The number of moles of Fe2+ and Fe3+ in 1 mole of Fe0.93O is 0.79 and 0.14 respectively.

C. Fe0.93O is metal deficient with lattice comprising of cubic closed packed arrangement of O2 ions.

D. The % composition of Fe2+ and Fe3+ in Fe0.93O is 85% and 15% respectively.
[24-Jan-2023 Shift 1]
When Fe0.93O is heated in presence of oxygen, it converts to Fe2O3 . The number of correct statement/s from the following is___

A. The equivalent weight of Fe0.93O is
Molecular weight
0.79
.

B. The number of moles of Fe2+ and Fe3+ in 1 mole of Fe0.93O is 0.79 and 0.14 respectively.

C. Fe0.93O is metal deficient with lattice comprising of cubic closed packed arrangement of O2 ions.

D. The % composition of Fe2+ and Fe3+ in Fe0.93O is 85% and 15% respectively.
[24-Jan-2023 Shift 1]
Q.11 Correct
Q.11 In-correct
Q.11 Unattempt
The number of units, which are used to express concentration of solutions from the following is____
Mass percent, Mole, Mole fraction, Molarity, ppm, Molality.
[24-Jan-2023 Shift 2]
The number of units, which are used to express concentration of solutions from the following is____
Mass percent, Mole, Mole fraction, Molarity, ppm, Molality.
[24-Jan-2023 Shift 2]
Q.12 Correct
Q.12 In-correct
Q.12 Unattempt
What is the mass ratio of ethylene glycol (C2H6O2., molar mass =62gmol ) required for making 500g of 0.25 molal aqueous solution and 250mL of 0.25 molar aqueous solution ?
[25-Jan-2023 Shift 2]
What is the mass ratio of ethylene glycol (C2H6O2., molar mass =62gmol ) required for making 500g of 0.25 molal aqueous solution and 250mL of 0.25 molar aqueous solution ?
[25-Jan-2023 Shift 2]
Q.13 Correct
Q.13 In-correct
Q.13 Unattempt
Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is _______
(Given : Molar mass of A=84gmol1 )
[25-Jan-2023 Shift 2]
Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is _______
(Given : Molar mass of A=84gmol1 )
[25-Jan-2023 Shift 2]
Q.14 Correct
Q.14 In-correct
Q.14 Unattempt
When a hydrocarbon A undergoes combustion in the presence of air, it requires 9.5 equivalents of oxygen and produces 3 equivalents of water. What is the molecular formula of A ?
[29-Jan-2023 Shift 2]
When a hydrocarbon A undergoes combustion in the presence of air, it requires 9.5 equivalents of oxygen and produces 3 equivalents of water. What is the molecular formula of A ?
[29-Jan-2023 Shift 2]
Q.15 Correct
Q.15 In-correct
Q.15 Unattempt
When 0.01mol of an organic compound containing 60% carbon was burnt completely, 4.4g of CO2 was produced. The molar mass of compound is _______ gmol1 (Nearest integer)
[29-Jan-2023 Shift 2]
When 0.01mol of an organic compound containing 60% carbon was burnt completely, 4.4g of CO2 was produced. The molar mass of compound is _______ gmol1 (Nearest integer)
[29-Jan-2023 Shift 2]
Q.16 Correct
Q.16 In-correct
Q.16 Unattempt
Some amount of dichloromethane (CH2Cl2) is added to 671.141mL of chloroform (CHCl3) to prepare 2.6×103M solution of CH2Cl2(DCM). The concentration of DCM is ppm _______ (by mass).
Given: Atomic mass: C=12;H:1;Cl=35.5 density of CHCl3=1.49gcm3
[30-Jan-2023 Shift 1]
Some amount of dichloromethane (CH2Cl2) is added to 671.141mL of chloroform (CHCl3) to prepare 2.6×103M solution of CH2Cl2(DCM). The concentration of DCM is ppm _______ (by mass).
Given: Atomic mass: C=12;H:1;Cl=35.5 density of CHCl3=1.49gcm3
[30-Jan-2023 Shift 1]
Q.17 Correct
Q.17 In-correct
Q.17 Unattempt
Match List I with List II:

[30-Jan-2023 Shift 2]
Match List I with List II:

[30-Jan-2023 Shift 2]

Q.18 Correct
Q.18 In-correct
Q.18 Unattempt
On complete combustion, 0.492g of an organic compound gave 0.792g of CO2.
The % of carbon in the organic compound is _______
(Nearest integer)
[31-Jan-2023 Shift 1]
On complete combustion, 0.492g of an organic compound gave 0.792g of CO2.
The % of carbon in the organic compound is _______
(Nearest integer)
[31-Jan-2023 Shift 1]
Q.19 Correct
Q.19 In-correct
Q.19 Unattempt
Zinc reacts with hydrochloric acid to give hydrogen and zinc chloride. The volume of hydrogen gas produced at STP from the reaction of 11.5g of zinc with excess HCl is _______ L (Nearest integer)
(Given : Molar mass of Zn is 65.4gmol1 and Molar volume of H2 at STP=22.7L )
[31-Jan-2023 Shift 1]
Zinc reacts with hydrochloric acid to give hydrogen and zinc chloride. The volume of hydrogen gas produced at STP from the reaction of 11.5g of zinc with excess HCl is _______ L (Nearest integer)
(Given : Molar mass of Zn is 65.4gmol1 and Molar volume of H2 at STP=22.7L )
[31-Jan-2023 Shift 1]
Q.20 Correct
Q.20 In-correct
Q.20 Unattempt
When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What is the molecular formula of A ?
[31-Jan-2023 Shift 2]
When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What is the molecular formula of A ?
[31-Jan-2023 Shift 2]
Q.21 Correct
Q.21 In-correct
Q.21 Unattempt
Assume carbon burns according to following equation :
2C( s)+O2(g)2CO(g)
When 12g carbon is burnt in 48g of oxygen, the volume of carbon monoxide produced is _______ ×101L at STP [nearest integer]
[Given : Assume CO as ideal gas, Mass of C is 12gmol1, Mass of O is 16gmol1 and molar volume of an ideal gas at STP is 22.7Lmol1 ]
[31-Jan-2023 Shift 2]
Assume carbon burns according to following equation :
2C( s)+O2(g)2CO(g)
When 12g carbon is burnt in 48g of oxygen, the volume of carbon monoxide produced is _______ ×101L at STP [nearest integer]
[Given : Assume CO as ideal gas, Mass of C is 12gmol1, Mass of O is 16gmol1 and molar volume of an ideal gas at STP is 22.7Lmol1 ]
[31-Jan-2023 Shift 2]
Q.22 Correct
Q.22 In-correct
Q.22 Unattempt
The density of 3M solution of NaCl is 1.0gmL1.
Molality of the solution is ______ ×102m
(Nearest integer).
Given: Molar mass of Na and Cl is 23 and 35.5g mol1 respectively.
[1-Feb-2023 Shift 1]
The density of 3M solution of NaCl is 1.0gmL1.
Molality of the solution is ______ ×102m
(Nearest integer).
Given: Molar mass of Na and Cl is 23 and 35.5g mol1 respectively.
[1-Feb-2023 Shift 1]
Q.23 Correct
Q.23 In-correct
Q.23 Unattempt
The molality of a 10%(vv) solution of di-bromine solution in CCl4 (carbon tetrachloride) is ' x '. x= _______ ×102M. (Nearest integer)
[Given : molar mass of Br2=160gmol1
atomic mass of C=12gmol1
atomic mass of Cl=35.5gmol1
density of dibromine =3.2gcm3
density of CCl4=1.6gcm3 ]
[1-Feb-2023 Shift 2]
The molality of a 10%(vv) solution of di-bromine solution in CCl4 (carbon tetrachloride) is ' x '. x= _______ ×102M. (Nearest integer)
[Given : molar mass of Br2=160gmol1
atomic mass of C=12gmol1
atomic mass of Cl=35.5gmol1
density of dibromine =3.2gcm3
density of CCl4=1.6gcm3 ]
[1-Feb-2023 Shift 2]
Q.24 Correct
Q.24 In-correct
Q.24 Unattempt
If 5 moles of BaCl2 is mixed with 2 moles of Na3PO4, the maximum number of moles of Ba3(PO4)2 formed is ...............
(Nearest integer)
[6-Apr-2023 shift 1]
If 5 moles of BaCl2 is mixed with 2 moles of Na3PO4, the maximum number of moles of Ba3(PO4)2 formed is ...............
(Nearest integer)
[6-Apr-2023 shift 1]
Q.25 Correct
Q.25 In-correct
Q.25 Unattempt
0.5g of an organic compound (X) with 60% carbon will produce ________ ×101g of CO2 on complete combustion.
[8-Apr-2023 shift 1]
0.5g of an organic compound (X) with 60% carbon will produce ________ ×101g of CO2 on complete combustion.
[8-Apr-2023 shift 1]
Q.26 Correct
Q.26 In-correct
Q.26 Unattempt
Which of the following have same number of significant figures?
A. 0.00253
B. 1. 0003
C. 15.0
D. 163
Choose the correct answer from the options given below
[8-Apr-2023 shift 2]
Which of the following have same number of significant figures?
A. 0.00253
B. 1. 0003
C. 15.0
D. 163
Choose the correct answer from the options given below
[8-Apr-2023 shift 2]
Q.27 Correct
Q.27 In-correct
Q.27 Unattempt
The number of molecules and moles in 2.8375 litres of O2 at STP are respectively
[10-Apr-2023 shift 1]
The number of molecules and moles in 2.8375 litres of O2 at STP are respectively
[10-Apr-2023 shift 1]
Q.28 Correct
Q.28 In-correct
Q.28 Unattempt
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : 3.1500g of hydrated oxalic acid dissolved in water to make 250.0mL solution will result in 0.1M oxalic acid solution.
Reason R : Molar mass of hydrated oxalic acid is 126gmol1 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 : 3.1500g of hydrated oxalic acid dissolved in water to make 250.0mL solution will result in 0.1M oxalic acid solution.
Reason R : Molar mass of hydrated oxalic acid is 126gmol1 In the light of the above statements, choose the correct answer from the options given below:
[10-Apr-2023 shift 2]
Q.29 Correct
Q.29 In-correct
Q.29 Unattempt
Match List I with List II

Choose the correct answer from the options given below:
[10-Apr-2023 shift 2]
Match List I with List II

Choose the correct answer from the options given below:
[10-Apr-2023 shift 2]
Q.30 Correct
Q.30 In-correct
Q.30 Unattempt
25mL of silver nitrate solution (1M) is added dropwise to 25mL of potassium iodide (1.05M) solution. The ion(s) present in very small quantity in the solution is/are
[11-Apr-2023 shift 1]
25mL of silver nitrate solution (1M) is added dropwise to 25mL of potassium iodide (1.05M) solution. The ion(s) present in very small quantity in the solution is/are
[11-Apr-2023 shift 1]
Q.31 Correct
Q.31 In-correct
Q.31 Unattempt
A solution of sugar is obtained by mixing 200g of its 25% solution and 500g of its 40% solution (both by mass). The mass percentage of the resulting sugar solution is _______ (Nearest integer)
[11-Apr-2023 shift 1]
A solution of sugar is obtained by mixing 200g of its 25% solution and 500g of its 40% solution (both by mass). The mass percentage of the resulting sugar solution is _______ (Nearest integer)
[11-Apr-2023 shift 1]
Q.32 Correct
Q.32 In-correct
Q.32 Unattempt
A solution is prepared by adding 2g of " X " to 1 mole of water. Mass percent of " X " in the solution is
[11-Apr-2023 shift 2]
A solution is prepared by adding 2g of " X " to 1 mole of water. Mass percent of " X " in the solution is
[11-Apr-2023 shift 2]
Q.33 Correct
Q.33 In-correct
Q.33 Unattempt
The volume of hydrogen liberated at STP by treating 2.4g of magnesium with excess of hydrochloric acid is ________ ×102L.
Given: Molar volume of gas is 22.4L at STP. Molar mass of magnesium is 24gmol1
[11-Apr-2023 shift 2]
The volume of hydrogen liberated at STP by treating 2.4g of magnesium with excess of hydrochloric acid is ________ ×102L.
Given: Molar volume of gas is 22.4L at STP. Molar mass of magnesium is 24gmol1
[11-Apr-2023 shift 2]
Q.34 Correct
Q.34 In-correct
Q.34 Unattempt
A metal chloride contains 55.0% of chlorine by weight . 100mL vapours of the metal chloride at STP weigh 0.57g. The molecular formula of the metal chloride is (Given: Atomic mass of chlorine is 35.5u )
[12-Apr-2023 shift 1]
A metal chloride contains 55.0% of chlorine by weight . 100mL vapours of the metal chloride at STP weigh 0.57g. The molecular formula of the metal chloride is (Given: Atomic mass of chlorine is 35.5u )
[12-Apr-2023 shift 1]
Q.35 Correct
Q.35 In-correct
Q.35 Unattempt
An organic compound gives 0.220g of CO2 and 0.126g of H2O on complete combustion. If the % of carbon is 24 then the % of hydrogen is ________ ×101. (Nearest integer)
[13-Apr-2023 shift 1]
An organic compound gives 0.220g of CO2 and 0.126g of H2O on complete combustion. If the % of carbon is 24 then the % of hydrogen is ________ ×101. (Nearest integer)
[13-Apr-2023 shift 1]
Q.36 Correct
Q.36 In-correct
Q.36 Unattempt
1g of a carbonate (M2CO3) on treatment with excess HCl produces 0.01mol of CO2. The molar mass of M2CO3 is _______ gmol1. (Nearest integer)
[13-Apr-2023 shift 2]
1g of a carbonate (M2CO3) on treatment with excess HCl produces 0.01mol of CO2. The molar mass of M2CO3 is _______ gmol1. (Nearest integer)
[13-Apr-2023 shift 2]
Q.37 Correct
Q.37 In-correct
Q.37 Unattempt
Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is,
Given : Atomic masses of C,H and N are 12,1 and 14 amu respectively.
The molar mass of the compound A is 162gmol1.
[28-Jun-2022-Shift-2]
Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is,
Given : Atomic masses of C,H and N are 12,1 and 14 amu respectively.
The molar mass of the compound A is 162gmol1.
[28-Jun-2022-Shift-2]
Q.38 Correct
Q.38 In-correct
Q.38 Unattempt
The complete combustion of 0.492g of an organic compound containing ' C ', ' H ' and ' O ' gives 0.793g of CO2 and 0.442g of H2O. The percentage of oxygen composition in the organic compound is_______ (nearest integer)
[28-Jun-2022-Shift-2]
The complete combustion of 0.492g of an organic compound containing ' C ', ' H ' and ' O ' gives 0.793g of CO2 and 0.442g of H2O. The percentage of oxygen composition in the organic compound is_______ (nearest integer)
[28-Jun-2022-Shift-2]
Q.39 Correct
Q.39 In-correct
Q.39 Unattempt
Production of iron in blast furnace follows the following equation
Fe3O4(s)+4CO(g)3Fe(l)+4CO2(g)
when 4.640kg of Fe3O4 and 2.520kg of CO are allowed to react then the amount of iron (in g ) produced is:
[29-Jun-2022-Shift-1]
Production of iron in blast furnace follows the following equation
Fe3O4(s)+4CO(g)3Fe(l)+4CO2(g)
when 4.640kg of Fe3O4 and 2.520kg of CO are allowed to react then the amount of iron (in g ) produced is:
[29-Jun-2022-Shift-1]
Q.40 Correct
Q.40 In-correct
Q.40 Unattempt
Geraniol, a volatile organic compound, is a component of rose oil. The density of the vapour is 0.46gL1 at 257C and 100 mmHg. The molar mass of geraniol is ______gmol1. (Nearest Integer)
[. Given : R=0.082LatmK1mol1 ]
[29-Jun-2022-Shift-1]
Geraniol, a volatile organic compound, is a component of rose oil. The density of the vapour is 0.46gL1 at 257C and 100 mmHg. The molar mass of geraniol is ______gmol1. (Nearest Integer)
[. Given : R=0.082LatmK1mol1 ]
[29-Jun-2022-Shift-1]
Q.41 Correct
Q.41 In-correct
Q.41 Unattempt
Using the rules for significant figures, the correct answer for the expression
0.02858×0.112
0.5702
will be
[29-Jun-2022-Shift-2]
Using the rules for significant figures, the correct answer for the expression
0.02858×0.112
0.5702
will be
[29-Jun-2022-Shift-2]
Q.42 Correct
Q.42 In-correct
Q.42 Unattempt
If a rocket runs on a fuel (C15H30) and liquid oxygen, the weight of oxygen required and CO2 released for every litre of fuel respectively are :
(Given : density of the fuel is 0.756gmL )
[24-Jun-2022-Shift-1]
If a rocket runs on a fuel (C15H30) and liquid oxygen, the weight of oxygen required and CO2 released for every litre of fuel respectively are :
(Given : density of the fuel is 0.756gmL )
[24-Jun-2022-Shift-1]
Q.43 Correct
Q.43 In-correct
Q.43 Unattempt
120g of an organic compound that contains only carbon and hydrogen gives 330g of CO2 and 270g of water on complete combustion. The percentage of carbon and hydrogen, respectively are
[24-Jun-2022-Shift-2]
120g of an organic compound that contains only carbon and hydrogen gives 330g of CO2 and 270g of water on complete combustion. The percentage of carbon and hydrogen, respectively are
[24-Jun-2022-Shift-2]
Q.44 Correct
Q.44 In-correct
Q.44 Unattempt
The number of N atoms in 681g of C7H5N3O6 is x×1021. The value of x is (NA=6.02×1023mol1)
(Nearest Integer)
[25-Jun-2022-Shift-1]
The number of N atoms in 681g of C7H5N3O6 is x×1021. The value of x is (NA=6.02×1023mol1)
(Nearest Integer)
[25-Jun-2022-Shift-1]
Q.45 Correct
Q.45 In-correct
Q.45 Unattempt
A protein ' A ' contains 0.30% of glycine (molecular weight 75 ). The minimum molar mass of the protein ' A ' is ____×103gmol1 [nearest integer]
[25-Jun-2022-Shift-2]
A protein ' A ' contains 0.30% of glycine (molecular weight 75 ). The minimum molar mass of the protein ' A ' is ____×103gmol1 [nearest integer]
[25-Jun-2022-Shift-2]
Q.46 Correct
Q.46 In-correct
Q.46 Unattempt
A commercially sold conc. HCl is 35%HCl by mass. If the density of this commercial acid is 1.46gmL, the molarity of this solution is:
(Atomic mass : Cl=35.5amu,H=1amu )
[26-Jun-2022-Shift-1]
A commercially sold conc. HCl is 35%HCl by mass. If the density of this commercial acid is 1.46gmL, the molarity of this solution is:
(Atomic mass : Cl=35.5amu,H=1amu )
[26-Jun-2022-Shift-1]
Q.47 Correct
Q.47 In-correct
Q.47 Unattempt
On complete combustion 0.30g of an organic compound gave 0.20g of carbon dioxide and 0.10g of water. The percentage of carbon in the given organic compound is ____(Nearest integer)
[26-Jun-2022-Shift-1]
On complete combustion 0.30g of an organic compound gave 0.20g of carbon dioxide and 0.10g of water. The percentage of carbon in the given organic compound is ____(Nearest integer)
[26-Jun-2022-Shift-1]
Q.48 Correct
Q.48 In-correct
Q.48 Unattempt
The moles of methane required to produce 81g of water after complete combustion is ____ ×102 mol. [nearest integer]
[26-Jun-2022-Shift-2]
The moles of methane required to produce 81g of water after complete combustion is ____ ×102 mol. [nearest integer]
[26-Jun-2022-Shift-2]
Q.49 Correct
Q.49 In-correct
Q.49 Unattempt
116g of a substance upon dissociation reaction, yields 7.5g of hydrogen, 60g of oxygen and 48.5g of carbon. Given that the atomic masses of H,O and C are 1, 16 and 12, respectively. The data agrees with how many formulae of the following?
A. CH3COOH,
B. HCHO,
C.CH3OOCH3,
D. CH3CHO
[27-Jun-2022-Shift-2]
116g of a substance upon dissociation reaction, yields 7.5g of hydrogen, 60g of oxygen and 48.5g of carbon. Given that the atomic masses of H,O and C are 1, 16 and 12, respectively. The data agrees with how many formulae of the following?
A. CH3COOH,
B. HCHO,
C.CH3OOCH3,
D. CH3CHO
[27-Jun-2022-Shift-2]
Q.50 Correct
Q.50 In-correct
Q.50 Unattempt
56.0 L of nitrogen gas is mixed with excess hydrogen gas and it is found that 20L of ammonia gas is produced. The volume of unused nitrogen gas is found to be______ L.
[25-Jul-2022-Shift-2]
56.0 L of nitrogen gas is mixed with excess hydrogen gas and it is found that 20L of ammonia gas is produced. The volume of unused nitrogen gas is found to be______ L.
[25-Jul-2022-Shift-2]
Q.51 Correct
Q.51 In-correct
Q.51 Unattempt
Chlorophyll extracted from the crushed green leaves was dissolved in water to make 2L solution of Mg of concentration 48ppm. The number of atoms of Mg in this solution is x×1020 atoms. The value of x is _________. (Nearest Integer)
(Given : Atomic mass of Mg is 24gmol1;NA=6.02×1023mol1 )
[26-Jul-2022-Shift-1]
Chlorophyll extracted from the crushed green leaves was dissolved in water to make 2L solution of Mg of concentration 48ppm. The number of atoms of Mg in this solution is x×1020 atoms. The value of x is _________. (Nearest Integer)
(Given : Atomic mass of Mg is 24gmol1;NA=6.02×1023mol1 )
[26-Jul-2022-Shift-1]
Q.52 Correct
Q.52 In-correct
Q.52 Unattempt
When 800mL of 0.5M nitric acid is heated in a beaker, its volume is reduced to half and 11.5g of nitric acid is evaporated. The molarity of the remaining nitric acid solution is x×102M. (Nearest integer)
(Molar mass of nitric acid is 63gmol1 )
[26-Jul-2022-Shift-1]
When 800mL of 0.5M nitric acid is heated in a beaker, its volume is reduced to half and 11.5g of nitric acid is evaporated. The molarity of the remaining nitric acid solution is x×102M. (Nearest integer)
(Molar mass of nitric acid is 63gmol1 )
[26-Jul-2022-Shift-1]
Q.53 Correct
Q.53 In-correct
Q.53 Unattempt
Hemoglobin contains 0.34% of iron by mass. The number of Fe atoms in 3.3g of hemoglobin is (Given: Atomic mass of Fe is 56u,NA=6.022×1023mol1.)
[26-Jul-2022-Shift-2]
Hemoglobin contains 0.34% of iron by mass. The number of Fe atoms in 3.3g of hemoglobin is (Given: Atomic mass of Fe is 56u,NA=6.022×1023mol1.)
[26-Jul-2022-Shift-2]
Q.54 Correct
Q.54 In-correct
Q.54 Unattempt
250g solution of D-glucose in water contains 10.8% of carbon by weight. The molality of the solution is nearest to
(Given: Atomic Weights are, H,1u;C,12u;O,16u )
[27-Jul-2022-Shift-1]
250g solution of D-glucose in water contains 10.8% of carbon by weight. The molality of the solution is nearest to
(Given: Atomic Weights are, H,1u;C,12u;O,16u )
[27-Jul-2022-Shift-1]
Q.55 Correct
Q.55 In-correct
Q.55 Unattempt
The normality of H2SO4 in the solution obtained on mixing 100mL of 0.1MH2SO4 with 50mL of 0.1MNaOH ________ is ×101N. (Nearest Integer)
[27-Jul-2022-Shift-2]
The normality of H2SO4 in the solution obtained on mixing 100mL of 0.1MH2SO4 with 50mL of 0.1MNaOH ________ is ×101N. (Nearest Integer)
[27-Jul-2022-Shift-2]
Q.56 Correct
Q.56 In-correct
Q.56 Unattempt
In the above reaction, 5g of toluene is converted into benzaldehyde with 92% yield. The amount of benzaldehyde produced is ________ ×102g. (Nearest integer)
[27-Jul-2022-Shift-2]

In the above reaction, 5g of toluene is converted into benzaldehyde with 92% yield. The amount of benzaldehyde produced is ________ ×102g. (Nearest integer)
[27-Jul-2022-Shift-2]
Q.57 Correct
Q.57 In-correct
Q.57 Unattempt
In the given reaction,
X+Y+3ZXYZ3
if one mole of each of X and Y with 0.05mol of Z gives compound XYZ3 - (Given : Atomic masses of X,Y and Z are 10, 20 and 30amu, respectively.) The yield of XYZ3 is _______g. (Nearest integer)
[28-Jul-2022-Shift-1]
In the given reaction,
X+Y+3ZXYZ3
if one mole of each of X and Y with 0.05mol of Z gives compound XYZ3 - (Given : Atomic masses of X,Y and Z are 10, 20 and 30amu, respectively.) The yield of XYZ3 is _______g. (Nearest integer)
[28-Jul-2022-Shift-1]
Q.58 Correct
Q.58 In-correct
Q.58 Unattempt
On complete combustion of 0.492g of an organic compound containing C,H and O,0.7938g of CO2 and 0.4428g of H2O was produced. The % composition of oxygen in the compound is _______.
[28-Jul-2022-Shift-1]
On complete combustion of 0.492g of an organic compound containing C,H and O,0.7938g of CO2 and 0.4428g of H2O was produced. The % composition of oxygen in the compound is _______.
[28-Jul-2022-Shift-1]
Q.59 Correct
Q.59 In-correct
Q.59 Unattempt
N2(g)
20g
+3
H2(g)
5g
2NH3(g)

Consider the above reaction, the limiting reagent of the reaction and number of moles of NH3 formed respectively are :
[29-Jul-2022-Shift-1]
N2(g)
20g
+3
H2(g)
5g
2NH3(g)

Consider the above reaction, the limiting reagent of the reaction and number of moles of NH3 formed respectively are :
[29-Jul-2022-Shift-1]
Q.60 Correct
Q.60 In-correct
Q.60 Unattempt
Consider the reaction
4HNO3(1)+3KCl(s)Cl2(g)+NOCl(g)+2H2O(g)+3KNO3(s)
The amount of HNO3 required to produce 110.0g of KNO3 is
(Given: Atomic masses of H,O,N and K are 1,16,14 and 39 , respectively.)
[29-Jul-2022-Shift-2]
Consider the reaction
4HNO3(1)+3KCl(s)Cl2(g)+NOCl(g)+2H2O(g)+3KNO3(s)
The amount of HNO3 required to produce 110.0g of KNO3 is
(Given: Atomic masses of H,O,N and K are 1,16,14 and 39 , respectively.)
[29-Jul-2022-Shift-2]
Q.61 Correct
Q.61 In-correct
Q.61 Unattempt
C(s)+O2(g)CO2(g)+400k.J
C(s)+
1
2
O2
(g)
CO(g)+100kJ

When coal of purity 60% is allowed to burn in presence of insufficient oxygen, 60% of carbon is converted into ' CO ' and the remaining is converted into ' CO2 '. The heat generated when 0.6kg of coal is burnt is _______.
[29-Jul-2022-Shift-2]
C(s)+O2(g)CO2(g)+400k.J
C(s)+
1
2
O2
(g)
CO(g)+100kJ

When coal of purity 60% is allowed to burn in presence of insufficient oxygen, 60% of carbon is converted into ' CO ' and the remaining is converted into ' CO2 '. The heat generated when 0.6kg of coal is burnt is _______.
[29-Jul-2022-Shift-2]
Q.62 Correct
Q.62 In-correct
Q.62 Unattempt
A 1.84mg sample of polyhydric alcoholic compound 'X' of molar mass 92.0gmol gave 1.344mL of H2 gas at STP. The number of alcoholic hydrogens present in compound ' X ' is ________.
[29-Jul-2022-Shift-2]
A 1.84mg sample of polyhydric alcoholic compound 'X' of molar mass 92.0gmol gave 1.344mL of H2 gas at STP. The number of alcoholic hydrogens present in compound ' X ' is ________.
[29-Jul-2022-Shift-2]
Q.63 Correct
Q.63 In-correct
Q.63 Unattempt
The number of significant figures in 50000.020×103 is ............
[26 Feb 2021 Shift 1]
The number of significant figures in 50000.020×103 is ............
[26 Feb 2021 Shift 1]
Q.64 Correct
Q.64 In-correct
Q.64 Unattempt
The NaNO3 weighed out to make 50mL of an aqueous solution containing 70.0mgNa+ per mL is ......... g. (Rounded off to the nearest integer) [Given : Atomic weight in gmol1,Na:23; N:14;0:16].
[26 Feb 2021 Shift 2]
The NaNO3 weighed out to make 50mL of an aqueous solution containing 70.0mgNa+ per mL is ......... g. (Rounded off to the nearest integer) [Given : Atomic weight in gmol1,Na:23; N:14;0:16].
[26 Feb 2021 Shift 2]
Q.65 Correct
Q.65 In-correct
Q.65 Unattempt
Complete combustion of 1.80g of an oxygen containing compound (CxHyOz) gave 2.64g of CO2 and 1.08g of H2O. The percentage of oxygen in the organic compound is
[25 Feb 2021 Shift 1]
Complete combustion of 1.80g of an oxygen containing compound (CxHyOz) gave 2.64g of CO2 and 1.08g of H2O. The percentage of oxygen in the organic compound is
[25 Feb 2021 Shift 1]
Q.66 Correct
Q.66 In-correct
Q.66 Unattempt
The formula of a gaseous hydrocarbon, which requires 6 times of its own volume of O2 for complete oxidation and produces 4 times its own volume of CO2 is CxHy. The value of y is ........... .
[24 Feb 2021 Shift 2]
The formula of a gaseous hydrocarbon, which requires 6 times of its own volume of O2 for complete oxidation and produces 4 times its own volume of CO2 is CxHy. The value of y is ........... .
[24 Feb 2021 Shift 2]
Q.67 Correct
Q.67 In-correct
Q.67 Unattempt
1.86g of aniline completely reacts to form acetanilide. 10% of the product is lost during purification. Amount of acetanilide obtained after purification (in g) is .......... ×102.
[24 Feb 2021 Shift 2]
1.86g of aniline completely reacts to form acetanilide. 10% of the product is lost during purification. Amount of acetanilide obtained after purification (in g) is .......... ×102.
[24 Feb 2021 Shift 2]
Q.68 Correct
Q.68 In-correct
Q.68 Unattempt
15mL of aqueous solution of Fe2+ in acidic medium completely reacted with 20mL of 0.03M aqueous Cr2O72. The molarity of the Fe2+ solution is ...... ×102M (Round off to the nearest integer).
[17 Mar 2021 Shift 1]
15mL of aqueous solution of Fe2+ in acidic medium completely reacted with 20mL of 0.03M aqueous Cr2O72. The molarity of the Fe2+ solution is ...... ×102M (Round off to the nearest integer).
[17 Mar 2021 Shift 1]
Q.69 Correct
Q.69 In-correct
Q.69 Unattempt
The mole fraction of a solute in a 100 molal aqueous solution ......... ×102 (Round off to the nearest integer).
[Given, atomic masses H:1.0u,O:16.0u ]
[17 Mar 2021 Shift 1]
The mole fraction of a solute in a 100 molal aqueous solution ......... ×102 (Round off to the nearest integer).
[Given, atomic masses H:1.0u,O:16.0u ]
[17 Mar 2021 Shift 1]
Q.70 Correct
Q.70 In-correct
Q.70 Unattempt
10.0mL of Na2CO3 solution is titrated against 0.2MHCl solution. The following titre values were obtained in 5 readings. 4.8mL,4.9mL, 5.0mL,5.0mL and 5.0mL based on these readings and convention of titrimetric estimation of concentration of Na2CO3 solution is ......... mM (Round off to the nearest integer).
[18 Mar 2021 Shift 2]
10.0mL of Na2CO3 solution is titrated against 0.2MHCl solution. The following titre values were obtained in 5 readings. 4.8mL,4.9mL, 5.0mL,5.0mL and 5.0mL based on these readings and convention of titrimetric estimation of concentration of Na2CO3 solution is ......... mM (Round off to the nearest integer).
[18 Mar 2021 Shift 2]
Q.71 Correct
Q.71 In-correct
Q.71 Unattempt
Complete combustion of 750g of an organic compound provides 420g of CO2 and 210g of H2O. The percentage composition of carbon and hydrogen in organic compound is 15.3 and ...... respectively (Round off to the nearest integer).
[16 Mar 2021 Shift 1]
Complete combustion of 750g of an organic compound provides 420g of CO2 and 210g of H2O. The percentage composition of carbon and hydrogen in organic compound is 15.3 and ...... respectively (Round off to the nearest integer).
[16 Mar 2021 Shift 1]
Q.72 Correct
Q.72 In-correct
Q.72 Unattempt
10.0 mL of 0.05 M KMnO4 solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is ........ ×102 g/L.
(Round off to the nearest integer)
[27 Jul 2021 Shift 2]
10.0 mL of 0.05 M KMnO4 solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is ........ ×102 g/L.
(Round off to the nearest integer)
[27 Jul 2021 Shift 2]
Q.73 Correct
Q.73 In-correct
Q.73 Unattempt
When 10mL of an aqueous solution of Fe2+ ions was titrated in the presence of dil H2SO4 using diphenylamine indicator, 15mL of 0.02M solution of K2Cr2O7 was required to get the end point. The molarity of the solution containing Fe2+ ions is x×102M. The value of x is _______.(Nearest integer)
[25 Jul 2021 Shift 1]
When 10mL of an aqueous solution of Fe2+ ions was titrated in the presence of dil H2SO4 using diphenylamine indicator, 15mL of 0.02M solution of K2Cr2O7 was required to get the end point. The molarity of the solution containing Fe2+ ions is x×102M. The value of x is _______.(Nearest integer)
[25 Jul 2021 Shift 1]
Q.74 Correct
Q.74 In-correct
Q.74 Unattempt
If the concentration of glucose (C6H12O6) in blood is 0.72gL1, the molarity of glucose in blood is ______ ×103M. (Nearest integer)
[Given: Atomic mass of C=12,H=1,O=16u]
[22 Jul 2021 Shift 2]
If the concentration of glucose (C6H12O6) in blood is 0.72gL1, the molarity of glucose in blood is ______ ×103M. (Nearest integer)
[Given: Atomic mass of C=12,H=1,O=16u]
[22 Jul 2021 Shift 2]
Q.75 Correct
Q.75 In-correct
Q.75 Unattempt
The number of significant figures in 0.00340 is __________ .
[25 Jul 2021 Shift 2]
The number of significant figures in 0.00340 is __________ .
[25 Jul 2021 Shift 2]
Q.76 Correct
Q.76 In-correct
Q.76 Unattempt
4g equimolar mixture of NaOH and Na2CO3contains xg of NaOH and y g of Na2CO3. The value of x is_______ g. (Nearest integer)
[20 Jul 2021 Shift 2]
4g equimolar mixture of NaOH and Na2CO3contains xg of NaOH and y g of Na2CO3. The value of x is_______ g. (Nearest integer)
[20 Jul 2021 Shift 2]
Q.77 Correct
Q.77 In-correct
Q.77 Unattempt
250mL of 0.5MNaOH was added to 500mL of 1MHCl. The number of unreacted HCl molecules in the solution after complete reaction is _______ ×1021.
(Nearest integer)
(NA=6.022×1023)
[20 Jul 2021 Shift 1]
250mL of 0.5MNaOH was added to 500mL of 1MHCl. The number of unreacted HCl molecules in the solution after complete reaction is _______ ×1021.
(Nearest integer)
(NA=6.022×1023)
[20 Jul 2021 Shift 1]
Q.78 Correct
Q.78 In-correct
Q.78 Unattempt
Sodium oxide reacts with water to produce sodium hydroxide. 20.0g of sodium oxide is dissolved in 500mL of water. Neglecting the change in volume, the concentration of the resulting NaOH solution is ......×101M.(Nearest integer)
[Atomic mass: Na=23.0,O=16.0,H=1.0]
[31 Aug 2021 Shift 2]
Sodium oxide reacts with water to produce sodium hydroxide. 20.0g of sodium oxide is dissolved in 500mL of water. Neglecting the change in volume, the concentration of the resulting NaOH solution is ......×101M.(Nearest integer)
[Atomic mass: Na=23.0,O=16.0,H=1.0]
[31 Aug 2021 Shift 2]
Q.79 Correct
Q.79 In-correct
Q.79 Unattempt
100g of propane is completely reacted with 1000g of oxygen. The mole fraction of carbon dioxide in the resulting mixture is x×102. The value of x is ......... (Nearest integer)
[Atomic weight : H=1.008,C=12.00,O=16.00]
[27 Aug 2021 Shift 2]
100g of propane is completely reacted with 1000g of oxygen. The mole fraction of carbon dioxide in the resulting mixture is x×102. The value of x is ......... (Nearest integer)
[Atomic weight : H=1.008,C=12.00,O=16.00]
[27 Aug 2021 Shift 2]
Q.80 Correct
Q.80 In-correct
Q.80 Unattempt
A chloro compound A,(i) Forms aldehydes on ozonolysis followed by the hydrolysis.
(ii) When vaporised completely, 1.53g of A gives 448mL of vapour at STP.
The number of carbon atoms in a molecule of compound A is .......... .
[26 Aug 2021 Shift 2]
A chloro compound A,(i) Forms aldehydes on ozonolysis followed by the hydrolysis.
(ii) When vaporised completely, 1.53g of A gives 448mL of vapour at STP.
The number of carbon atoms in a molecule of compound A is .......... .
[26 Aug 2021 Shift 2]
Q.81 Correct
Q.81 In-correct
Q.81 Unattempt
The number of atoms in 8g of sodium is x×1023. The value of x is ......... . (Nearest integer) [Given : NA=6.02×1023mol1Atomic mass of Na=23.0u]
[1 Sep 2021 Shift 2]
The number of atoms in 8g of sodium is x×1023. The value of x is ......... . (Nearest integer) [Given : NA=6.02×1023mol1Atomic mass of Na=23.0u]
[1 Sep 2021 Shift 2]
Q.82 Correct
Q.82 In-correct
Q.82 Unattempt
4.5g of compound A(MW=90) was used to make 250mL of its aqueous solution. The molarity of the solution is M is x×101. The value of x is (Rounded off to the nearest integer)
[2020]
4.5g of compound A(MW=90) was used to make 250mL of its aqueous solution. The molarity of the solution is M is x×101. The value of x is (Rounded off to the nearest integer)
[2020]
Q.83 Correct
Q.83 In-correct
Q.83 Unattempt
The molarity of HNO3 in a sample which has density 1.4 gmL and mass percentage of 63% is __________. (Molecular Weight of HNO3=63)
[NV, Jan. 09, 2020(I)]
The molarity of HNO3 in a sample which has density 1.4 gmL and mass percentage of 63% is __________. (Molecular Weight of HNO3=63)
[NV, Jan. 09, 2020(I)]
Q.84 Correct
Q.84 In-correct
Q.84 Unattempt
Amongst the following statements, that which was not proposed by Dalton was:
[Jan. 07,2020 (I)]
Amongst the following statements, that which was not proposed by Dalton was:
[Jan. 07,2020 (I)]
Q.85 Correct
Q.85 In-correct
Q.85 Unattempt
10.30mg of O2 is dissolved into a liter of sea water of density 1.03gmL. The concentration of O2 in ppm is _______.
[NV, Jan. 09, 2020 (II)]
10.30mg of O2 is dissolved into a liter of sea water of density 1.03gmL. The concentration of O2 in ppm is _______.
[NV, Jan. 09, 2020 (II)]
Q.86 Correct
Q.86 In-correct
Q.86 Unattempt
Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in grams) of the salt required to achieve 10 ppm of iron in 100kg of wheat is ______ .
Atomic weight: Fe=55.85;S=32.00;O=16.00
[NV, Jan. 08 , 2020 (I)]
Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in grams) of the salt required to achieve 10 ppm of iron in 100kg of wheat is ______ .
Atomic weight: Fe=55.85;S=32.00;O=16.00
[NV, Jan. 08 , 2020 (I)]
Q.87 Correct
Q.87 In-correct
Q.87 Unattempt
NaClO3 is used, even in spacecrafts, to produce O2. The daily consumption of pure O2 by a person is 492L at 1 atm, 300K. How much amount of NaClO3, in grams, is required to produce O2 for the daily consumption of a person at 1atm,300K ? ________.
NaClO3(s)+Fe(s)O2(g)+NaCl(s)+FeO(s)R=0.082 Latm mol1K1
[NV, Jan. 08,2020 (II)]
NaClO3 is used, even in spacecrafts, to produce O2. The daily consumption of pure O2 by a person is 492L at 1 atm, 300K. How much amount of NaClO3, in grams, is required to produce O2 for the daily consumption of a person at 1atm,300K ? ________.
NaClO3(s)+Fe(s)O2(g)+NaCl(s)+FeO(s)R=0.082 Latm mol1K1
[NV, Jan. 08,2020 (II)]
Q.88 Correct
Q.88 In-correct
Q.88 Unattempt
The ammonia (NH3) released on quantitative reaction of 0.6g urea (NH2CONH2) with sodium hydroxide (NaOH) can be neutralized by:
[Jan. 07, 2020 (II)]
The ammonia (NH3) released on quantitative reaction of 0.6g urea (NH2CONH2) with sodium hydroxide (NaOH) can be neutralized by:
[Jan. 07, 2020 (II)]
Q.89 Correct
Q.89 In-correct
Q.89 Unattempt
A solution of two components containing n1 moles of the 1st component and n2 moles of the 2nd component is prepared. M1 and M2 are the molecular weights of component 1 and 2 respectively. If d is the density of the solution in gmL1,C2 is the molarity and x2 is the mole fraction of the 2nd component, then C2 can be expressed as:
[Sep. 06,2020(I)]
A solution of two components containing n1 moles of the 1st component and n2 moles of the 2nd component is prepared. M1 and M2 are the molecular weights of component 1 and 2 respectively. If d is the density of the solution in gmL1,C2 is the molarity and x2 is the mole fraction of the 2nd component, then C2 can be expressed as:
[Sep. 06,2020(I)]
Q.90 Correct
Q.90 In-correct
Q.90 Unattempt
The average molar mass of chlorine is 35.5gmol1. The ratio of 35Cl to 37Cl in naturally occrring chlorine is close to:
[Sep. 06, 2020 (II)]
The average molar mass of chlorine is 35.5gmol1. The ratio of 35Cl to 37Cl in naturally occrring chlorine is close to:
[Sep. 06, 2020 (II)]
Q.91 Correct
Q.91 In-correct
Q.91 Unattempt
The ratio of the mass percentages of ' C&H and ' C&O of a saturated acyclic organic compound 'X' are 4:1 and 3:4 respectively. Then, the moles of oxygen gas required for complete combustion of two moles of organic compound ' X 'is _________.
[NV, Sep. 02,2020 (II)]
The ratio of the mass percentages of ' C&H and ' C&O of a saturated acyclic organic compound 'X' are 4:1 and 3:4 respectively. Then, the moles of oxygen gas required for complete combustion of two moles of organic compound ' X 'is _________.
[NV, Sep. 02,2020 (II)]
Q.92 Correct
Q.92 In-correct
Q.92 Unattempt
The minimum number of moles of O2 required for complete combustion of 1 mole of propane and 2 moles of butane is _________.
[NV, Sep. 05, 2020(I)]
The minimum number of moles of O2 required for complete combustion of 1 mole of propane and 2 moles of butane is _________.
[NV, Sep. 05, 2020(I)]
Q.93 Correct
Q.93 In-correct
Q.93 Unattempt
The volume, in mL, of 0.02MK2Cr2O7 solution required to react with 0.288g of ferrous oxalate in acidic medium is _______. (Molar mass of Fe=56gmol1 )
[NV, Sep. 05,2020(II)]
The volume, in mL, of 0.02MK2Cr2O7 solution required to react with 0.288g of ferrous oxalate in acidic medium is _______. (Molar mass of Fe=56gmol1 )
[NV, Sep. 05,2020(II)]
Q.94 Correct
Q.94 In-correct
Q.94 Unattempt
A 20.0mL solution containing 0.2 g impure H2O2 reacts completely with 0.316g of KMnO4 in acid solution. The purity of H2O2( in % ) is ________. (mol. wt. of H2O2=34; mol. wt. of KMnO4=158 )
[NV, Sep. 04,2020(I)]
A 20.0mL solution containing 0.2 g impure H2O2 reacts completely with 0.316g of KMnO4 in acid solution. The purity of H2O2( in % ) is ________. (mol. wt. of H2O2=34; mol. wt. of KMnO4=158 )
[NV, Sep. 04,2020(I)]
Q.95 Correct
Q.95 In-correct
Q.95 Unattempt
The mass of ammonia in grams produced when 2.8kg of dinitrogen quantitatively reacts with 1kg of dihydrogen is _________.
[NV, Sep. 04,2020(I)]
The mass of ammonia in grams produced when 2.8kg of dinitrogen quantitatively reacts with 1kg of dihydrogen is _________.
[NV, Sep. 04,2020(I)]
Q.96 Correct
Q.96 In-correct
Q.96 Unattempt
A 100mL solution was made by adding 1.43g of Na2CO3xH2O. The normality of the solution is 0.1N.
The value of x is ________.
(The atomic mass of Na is 23gmol )
[NV, Sep. 04, 2020 (II)]
A 100mL solution was made by adding 1.43g of Na2CO3xH2O. The normality of the solution is 0.1N.
The value of x is ________.
(The atomic mass of Na is 23gmol )
[NV, Sep. 04, 2020 (II)]
Q.97 Correct
Q.97 In-correct
Q.97 Unattempt
The mole fraction of glucose (C6H12O6) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the nearest integer, is _______ .
[NV, Sep. 03, 2020 (I)]
The mole fraction of glucose (C6H12O6) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the nearest integer, is _______ .
[NV, Sep. 03, 2020 (I)]
Q.98 Correct
Q.98 In-correct
Q.98 Unattempt
6.023×1022 molecules are present in 10g of a substance x. The molarity of a solution containing 5g of substance x in 2 L solution is ________ ×103
[NV, Sep. 03, 2020 (II)]
6.023×1022 molecules are present in 10g of a substance x. The molarity of a solution containing 5g of substance x in 2 L solution is ________ ×103
[NV, Sep. 03, 2020 (II)]
Q.99 Correct
Q.99 In-correct
Q.99 Unattempt
The volume (in mL ) of 0.1NNaOH required to neutralise 10mL of 0.1N phosphinic acid is ________.
[NV, Sep. 03, 2020 (II)]
The volume (in mL ) of 0.1NNaOH required to neutralise 10mL of 0.1N phosphinic acid is ________.
[NV, Sep. 03, 2020 (II)]
Q.100 Correct
Q.100 In-correct
Q.100 Unattempt
8g of NaOH is dissolved in 18g of H2O. Mole fraction of NaOH in solution and molality (in molkg1 ) of the solution respectively are :
[Jan. 12, 2019 (II)]
8g of NaOH is dissolved in 18g of H2O. Mole fraction of NaOH in solution and molality (in molkg1 ) of the solution respectively are :
[Jan. 12, 2019 (II)]
Q.101 Correct
Q.101 In-correct
Q.101 Unattempt
The amount of sugar (C12H22O11) required to prepare 2 L of its 0.1M aqueous solution is:
[Jan. 10 2019(II)]
The amount of sugar (C12H22O11) required to prepare 2 L of its 0.1M aqueous solution is:
[Jan. 10 2019(II)]
Q.102 Correct
Q.102 In-correct
Q.102 Unattempt
50mL of 0.5M oxalic acid is needed to neutralize 25mL of sodium hydroxide solution. The amount of NaOH in 50mL of the given sodium hydroxide solution is:
[Jan. 12,2019 (I)]
50mL of 0.5M oxalic acid is needed to neutralize 25mL of sodium hydroxide solution. The amount of NaOH in 50mL of the given sodium hydroxide solution is:
[Jan. 12,2019 (I)]
Q.103 Correct
Q.103 In-correct
Q.103 Unattempt
A 10mg effervescent tablet containing sodium bicarbonate and oxalic acid releases 0.25mL of CO2 at T=298.15K and P=1 bar. If molar volume of CO2 is 25.0L under such condition, what is the percentage of sodium bicarbonate in each tablet?
[Molar mass of NaHCO3=84gmol1]
[Jan. 11, 2019 (I)]
A 10mg effervescent tablet containing sodium bicarbonate and oxalic acid releases 0.25mL of CO2 at T=298.15K and P=1 bar. If molar volume of CO2 is 25.0L under such condition, what is the percentage of sodium bicarbonate in each tablet?
[Molar mass of NaHCO3=84gmol1]
[Jan. 11, 2019 (I)]
Q.104 Correct
Q.104 In-correct
Q.104 Unattempt
25mL of the given HCl solution requires 30mL of 0.1M sodium carbonate solution. What is the volume of this HCl solution required to titrate 30mL of 0.2M aqueous NaOH solution?
[Jan.11,2019 (II)]
25mL of the given HCl solution requires 30mL of 0.1M sodium carbonate solution. What is the volume of this HCl solution required to titrate 30mL of 0.2M aqueous NaOH solution?
[Jan.11,2019 (II)]
Q.105 Correct
Q.105 In-correct
Q.105 Unattempt
For the following reaction the mass of water produced from 445g of C57H110O6 is:
2C57H110O6(s)+163O2(g)114CO2(g)+110H2O(1)
[Jan. 9, 2019 (II)]
For the following reaction the mass of water produced from 445g of C57H110O6 is:
2C57H110O6(s)+163O2(g)114CO2(g)+110H2O(1)
[Jan. 9, 2019 (II)]
Q.106 Correct
Q.106 In-correct
Q.106 Unattempt
The percentage composition of carbon by mole in methane is :
[April 8, 2019(II)]
The percentage composition of carbon by mole in methane is :
[April 8, 2019(II)]
Q.107 Correct
Q.107 In-correct
Q.107 Unattempt
5 moles of AB2 weigh 125×103kg and 10 moles of A2B2 weigh 300×103kg. The molar mass of A(MA) and molar mass of B(MB) in kgmol1 are:
[April 12, 2019(I)]
5 moles of AB2 weigh 125×103kg and 10 moles of A2B2 weigh 300×103kg. The molar mass of A(MA) and molar mass of B(MB) in kgmol1 are:
[April 12, 2019(I)]
Q.108 Correct
Q.108 In-correct
Q.108 Unattempt
The minimum amount of O2(g) consumed per gram of reactant is for the reaction : (Given atomic mass: Fe=56, O=16,Mg=24,P=31,C=12,H=1)
[April 10, 2019 (II)]
The minimum amount of O2(g) consumed per gram of reactant is for the reaction : (Given atomic mass: Fe=56, O=16,Mg=24,P=31,C=12,H=1)
[April 10, 2019 (II)]
Q.109 Correct
Q.109 In-correct
Q.109 Unattempt
For a reaction, N2(g)+3H2(g)2NH3(g); identify dihydrogen (H2) as a limiting reagent in the following reaction mixtures.
[April 9, 2019 (I)]
For a reaction, N2(g)+3H2(g)2NH3(g); identify dihydrogen (H2) as a limiting reagent in the following reaction mixtures.
[April 9, 2019 (I)]
Q.110 Correct
Q.110 In-correct
Q.110 Unattempt
0.27g of a long chain fatty acid was dissolved in 100cm3 of hexane. 10mL of this solution was added dropwise to the surface of water in a round watch glass. Hexane evaporates and a monolayer is formed. The distance from edge to centre of the watch glass is 10cm. What is the height of the monolayer?
[Density of fatty acid =0.9gcm3;π=3]
[April 8, 2019 (II)]
0.27g of a long chain fatty acid was dissolved in 100cm3 of hexane. 10mL of this solution was added dropwise to the surface of water in a round watch glass. Hexane evaporates and a monolayer is formed. The distance from edge to centre of the watch glass is 10cm. What is the height of the monolayer?
[Density of fatty acid =0.9gcm3;π=3]
[April 8, 2019 (II)]
Q.111 Correct
Q.111 In-correct
Q.111 Unattempt
An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only, chlorine atoms present in 1g of chlorohydrocarbon are:
(Atomic wt. of Cl=35.5u; Avogadro constant =6.023×1023mol1)
[Online April 16,2018]
An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only, chlorine atoms present in 1g of chlorohydrocarbon are:
(Atomic wt. of Cl=35.5u; Avogadro constant =6.023×1023mol1)
[Online April 16,2018]
Q.112 Correct
Q.112 In-correct
Q.112 Unattempt
The ratio of mass percent of C and H of an organic compound (CxHYOZ) is 6:1. If one molecule of the above compound (CXHYO2) contains half as much oxygen as required to burn one molecule of compound CXHY completely to CO2 and H2O. The empirical formula of compound CXHYOZ is:
[2018]
The ratio of mass percent of C and H of an organic compound (CxHYOZ) is 6:1. If one molecule of the above compound (CXHYO2) contains half as much oxygen as required to burn one molecule of compound CXHY completely to CO2 and H2O. The empirical formula of compound CXHYOZ is:
[2018]
Q.113 Correct
Q.113 In-correct
Q.113 Unattempt
A sample of NaClO3 is converted by heat to NaCl with a loss of 0.16 g of oxygen. The residue is dissolved in water and precipitated as AgCl. The mass of AgCl (in g ) obtained will be: (Given: Molar mass of AgCl=143.5gmol1 )
[Online April 15, 2018 (I)]
A sample of NaClO3 is converted by heat to NaCl with a loss of 0.16 g of oxygen. The residue is dissolved in water and precipitated as AgCl. The mass of AgCl (in g ) obtained will be: (Given: Molar mass of AgCl=143.5gmol1 )
[Online April 15, 2018 (I)]
Q.114 Correct
Q.114 In-correct
Q.114 Unattempt
Excess of NaOH (aq) was added to 100mL of FeCl3(aq) resulting into 2.14g of Fe(OH)3. The molarity of FeCl3 (aq) is:
(Given molar mass of Fe=56gmol1 and molar mass of Cl=35.5gmol1)
[Online April 8, 2017]
Excess of NaOH (aq) was added to 100mL of FeCl3(aq) resulting into 2.14g of Fe(OH)3. The molarity of FeCl3 (aq) is:
(Given molar mass of Fe=56gmol1 and molar mass of Cl=35.5gmol1)
[Online April 8, 2017]
Q.115 Correct
Q.115 In-correct
Q.115 Unattempt
The most abundant elements by mass in the body of a healthy human adult are: [2017] Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75kg person would gain if all 1H atoms are replaced by 2H atoms is
[2017]
The most abundant elements by mass in the body of a healthy human adult are: [2017] Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75kg person would gain if all 1H atoms are replaced by 2H atoms is
[2017]
Q.116 Correct
Q.116 In-correct
Q.116 Unattempt
What quantity (in mL ) of a 45% acid solution of a monoprotic strong acid must be mixed with a 20% solution of the same acid to produce 800mL of a 29.875% acid solution?
[Online April 9,2017]
What quantity (in mL ) of a 45% acid solution of a monoprotic strong acid must be mixed with a 20% solution of the same acid to produce 800mL of a 29.875% acid solution?
[Online April 9,2017]
Q.117 Correct
Q.117 In-correct
Q.117 Unattempt
5L of an alkane requires 25L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is:
[Online April 9, 2016]
5L of an alkane requires 25L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is:
[Online April 9, 2016]
Q.118 Correct
Q.118 In-correct
Q.118 Unattempt
At 300K and 1atm,15mL of a gaseous hydrocarbon requires 375mL air containing 20%O2 by volume for complete combustion. After combustion the gases occupy 330mL. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:
[2016]
At 300K and 1atm,15mL of a gaseous hydrocarbon requires 375mL air containing 20%O2 by volume for complete combustion. After combustion the gases occupy 330mL. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:
[2016]
Q.119 Correct
Q.119 In-correct
Q.119 Unattempt
The amount of arsenic pentasulphide that can be obtained when 35.5g arsenic acid is treated with excess H2S in the presence of conc. HCl (assuming 100% conversion ) is:
[Online April 9, 2016]
The amount of arsenic pentasulphide that can be obtained when 35.5g arsenic acid is treated with excess H2S in the presence of conc. HCl (assuming 100% conversion ) is:
[Online April 9, 2016]
Q.120 Correct
Q.120 In-correct
Q.120 Unattempt
The volume of 0.1N dibasic acid sufficient to neutralize 1 g of a base that furnishes 0.04 mole of OH in aqueous solution is :
[Online April 10,2016]
The volume of 0.1N dibasic acid sufficient to neutralize 1 g of a base that furnishes 0.04 mole of OH in aqueous solution is :
[Online April 10,2016]
Q.121 Correct
Q.121 In-correct
Q.121 Unattempt
The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na+ (Mol. wt. 206 . What would be the maximum uptake of Ca2+ ions by the resin when expressed in mole per gram resin?
[2015]
The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na+ (Mol. wt. 206 . What would be the maximum uptake of Ca2+ ions by the resin when expressed in mole per gram resin?
[2015]
Q.122 Correct
Q.122 In-correct
Q.122 Unattempt
Choose the incorrect formula out of the four compounds for an element X below:
[Online April 11, 2015]
Choose the incorrect formula out of the four compounds for an element X below:
[Online April 11, 2015]
Q.123 Correct
Q.123 In-correct
Q.123 Unattempt
3 g of activated charcoal was added to 50mL of acetic acid solution (0.06N) in a flask. After an hour it was filtered and the strength of the filtrate was found to be 0.042N. The amount of acetic acid adsorbed (per gram of charcoal) is:
[2015]
3 g of activated charcoal was added to 50mL of acetic acid solution (0.06N) in a flask. After an hour it was filtered and the strength of the filtrate was found to be 0.042N. The amount of acetic acid adsorbed (per gram of charcoal) is:
[2015]
Q.124 Correct
Q.124 In-correct
Q.124 Unattempt
A sample of a hydrate of barium chloride weighing 61g was heated until all the water of hydration is removed. The dried sample weighed 52g. The formula of the hydrated salt is : (atomic mass, Ba=137amu,Cl=35.5 amu)
[Online April 10, 2015]
A sample of a hydrate of barium chloride weighing 61g was heated until all the water of hydration is removed. The dried sample weighed 52g. The formula of the hydrated salt is : (atomic mass, Ba=137amu,Cl=35.5 amu)
[Online April 10, 2015]
Q.125 Correct
Q.125 In-correct
Q.125 Unattempt
A+2B+3CAB2C3 Reaction of 6.0g of A,6.0×1023 atoms of B, and 0.036 mol of C yields 4.8g of compound AB2C3. If the atomic mass of A and C are 60 and 80amu, respectively, the atomic mass of B is ( Avogadro no.=6×1023) :
[Online April 11, 2015]
A+2B+3CAB2C3 Reaction of 6.0g of A,6.0×1023 atoms of B, and 0.036 mol of C yields 4.8g of compound AB2C3. If the atomic mass of A and C are 60 and 80amu, respectively, the atomic mass of B is ( Avogadro no.=6×1023) :
[Online April 11, 2015]
Q.126 Correct
Q.126 In-correct
Q.126 Unattempt
In Carius method of estimation of halogens, 250mg of an organic compound gave 141mg of AgBr. The percentage of bromine in the compound is :
(at. mass Ag=108;Br=80 )
[2015]
In Carius method of estimation of halogens, 250mg of an organic compound gave 141mg of AgBr. The percentage of bromine in the compound is :
(at. mass Ag=108;Br=80 )
[2015]
Q.127 Correct
Q.127 In-correct
Q.127 Unattempt
Dissolving 120g of a compound of (mol. wt. 60 ) in 1000g of water gave a solution of density 1.12gmL. The molarity of the solution is:
[Online April 9,2014]
Dissolving 120g of a compound of (mol. wt. 60 ) in 1000g of water gave a solution of density 1.12gmL. The molarity of the solution is:
[Online April 9,2014]
Q.128 Correct
Q.128 In-correct
Q.128 Unattempt
The amount of oxygen in 3.6 moles of water is:
[Online April 9, 2014]
The amount of oxygen in 3.6 moles of water is:
[Online April 9, 2014]
Q.129 Correct
Q.129 In-correct
Q.129 Unattempt
A gaseous compound of nitrogen and hydrogen contains 12.5% (by mass) of hydrogen. The density of the compound relative to hydrogen is 16. The molecular formula of the compound is:
[Online April 11,2014]
A gaseous compound of nitrogen and hydrogen contains 12.5% (by mass) of hydrogen. The density of the compound relative to hydrogen is 16. The molecular formula of the compound is:
[Online April 11,2014]
Q.130 Correct
Q.130 In-correct
Q.130 Unattempt
A gaseous compound of nitrogen and hydrogen contains 12.5% (by mass) of hydrogen. The density of the compound relative to hydrogen is 16. The molecular formula of the compound is:
[Online April 11,2014]
A gaseous compound of nitrogen and hydrogen contains 12.5% (by mass) of hydrogen. The density of the compound relative to hydrogen is 16. The molecular formula of the compound is:
[Online April 11,2014]
Q.131 Correct
Q.131 In-correct
Q.131 Unattempt
The amount of BaSO4 formed upon mixing 100mL of 20.8% BaCl2 solution with 50mL of 9.8%H2SO4 solution will be:
(Ba=137,Cl=35.5,S=32,H=1 and O=16)
[Online April 12, 2014]
The amount of BaSO4 formed upon mixing 100mL of 20.8% BaCl2 solution with 50mL of 9.8%H2SO4 solution will be:
(Ba=137,Cl=35.5,S=32,H=1 and O=16)
[Online April 12, 2014]
Q.132 Correct
Q.132 In-correct
Q.132 Unattempt
The density of 3M solution of sodium chloride is 1.252g mL1. The molality of the solution will be:
(molar mass, NaCl=58.5gmol1 )
[Online April 22, 2013]
The density of 3M solution of sodium chloride is 1.252g mL1. The molality of the solution will be:
(molar mass, NaCl=58.5gmol1 )
[Online April 22, 2013]
Q.133 Correct
Q.133 In-correct
Q.133 Unattempt
Number of atoms in the following samples of substances is the largest in:
[Online April 23, 2013]
Number of atoms in the following samples of substances is the largest in:
[Online April 23, 2013]
Q.134 Correct
Q.134 In-correct
Q.134 Unattempt
10mL of 2(M)NaOH solution is added to 200mL of 0.5 (M) of NaOH solution. What is the final concentration ?
[Online April 25, 2013]
10mL of 2(M)NaOH solution is added to 200mL of 0.5 (M) of NaOH solution. What is the final concentration ?
[Online April 25, 2013]
Q.135 Correct
Q.135 In-correct
Q.135 Unattempt
6 litres of an alkene require 27 litres of oxygen at constant temperature and pressure for complete combustion. The alkene is:
[Online April 25, 2013]
6 litres of an alkene require 27 litres of oxygen at constant temperature and pressure for complete combustion. The alkene is:
[Online April 25, 2013]
Q.136 Correct
Q.136 In-correct
Q.136 Unattempt
A gaseous hydrocarbon gives upon combustion 0.72g of water and 3.08g. of CO2. The empirical formula of the hydrocarbon is :
[2013]
A gaseous hydrocarbon gives upon combustion 0.72g of water and 3.08g. of CO2. The empirical formula of the hydrocarbon is :
[2013]
Q.137 Correct
Q.137 In-correct
Q.137 Unattempt
1 gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186mole of CO2. The molar mass of M2CO3 in gmol1 is:
[2013]
1 gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186mole of CO2. The molar mass of M2CO3 in gmol1 is:
[2013]
Q.138 Correct
Q.138 In-correct
Q.138 Unattempt
The concentrated sulphuric acid that is peddled commercial is 95%H2SO4 by weight. If the density of this commercial acid is 1.834gcm3, the molarity of this solution is
[Online May 7, 2012]
The concentrated sulphuric acid that is peddled commercial is 95%H2SO4 by weight. If the density of this commercial acid is 1.834gcm3, the molarity of this solution is
[Online May 7, 2012]
Q.139 Correct
Q.139 In-correct
Q.139 Unattempt
The ratio of number of oxygen atoms (O) in 16.0 g ozone (O3),28.0g carbon monoxide (CO) and 16.0 oxygen (O2) is (Atomic mass: C=12,O=16 and Avogadro's constant NA=6.0×1023mol1)
[Online May 7, 2012]
The ratio of number of oxygen atoms (O) in 16.0 g ozone (O3),28.0g carbon monoxide (CO) and 16.0 oxygen (O2) is (Atomic mass: C=12,O=16 and Avogadro's constant NA=6.0×1023mol1)
[Online May 7, 2012]
Q.140 Correct
Q.140 In-correct
Q.140 Unattempt
The ppm level of F in a 500g sample of a tooth paste containing 0.2gF is
[Online May 12, 2012]
The ppm level of F in a 500g sample of a tooth paste containing 0.2gF is
[Online May 12, 2012]
Q.141 Correct
Q.141 In-correct
Q.141 Unattempt
5g of benzene on nitration gave 6.6g of nitrobenzene. The theoretical yicld of the nitrobenzene will be
[Online May 12, 2012]
5g of benzene on nitration gave 6.6g of nitrobenzene. The theoretical yicld of the nitrobenzene will be
[Online May 12, 2012]
Q.142 Correct
Q.142 In-correct
Q.142 Unattempt
A transition metal M forms a volatile chloride which has a vapour density of 94.8. If it contains 74.75% of chlorine the formula of the metal chloride will be
[Online May 26, 2012]
A transition metal M forms a volatile chloride which has a vapour density of 94.8. If it contains 74.75% of chlorine the formula of the metal chloride will be
[Online May 26, 2012]
Q.143 Correct
Q.143 In-correct
Q.143 Unattempt
An aqueous solution of oxalic acid dihydrate contains its 6.3 g in 250mL. The volume of 0.1NNaOH required to completely neutralize 10mL of this solution
[Online May 12, 2012]
An aqueous solution of oxalic acid dihydrate contains its 6.3 g in 250mL. The volume of 0.1NNaOH required to completely neutralize 10mL of this solution
[Online May 12, 2012]
Q.144 Correct
Q.144 In-correct
Q.144 Unattempt
The molality of a urea solution in which 0.0100g of urea, [(NH2)2CO] is added to 0.3000dm3 of water at STP is:
[2011RS]
The molality of a urea solution in which 0.0100g of urea, [(NH2)2CO] is added to 0.3000dm3 of water at STP is:
[2011RS]
Q.145 Correct
Q.145 In-correct
Q.145 Unattempt
The density (in gmL1 ) of a 3.60M sulphuric acid solution that is 29%H2SO4 (molar mass =98gmol1 ) by mass will be
[2007]
The density (in gmL1 ) of a 3.60M sulphuric acid solution that is 29%H2SO4 (molar mass =98gmol1 ) by mass will be
[2007]
Q.146 Correct
Q.146 In-correct
Q.146 Unattempt
In the reaction, [2007] 2Al(s)+6HCl(aq)2Al3+(aq)+6Cl(aq)+3H2(g)
[2007]
In the reaction, [2007] 2Al(s)+6HCl(aq)2Al3+(aq)+6Cl(aq)+3H2(g)
[2007]
Q.147 Correct
Q.147 In-correct
Q.147 Unattempt
How many moles of magnesium phosphate, Mg3(PO4)2 will contain 0.25 mole of oxygen atoms?
[2006]
How many moles of magnesium phosphate, Mg3(PO4)2 will contain 0.25 mole of oxygen atoms?
[2006]
Q.148 Correct
Q.148 In-correct
Q.148 Unattempt
Density of a 2.05M solution of acetic acid in water is 1.02 gmL. The molality of the solution is
[2006]
Density of a 2.05M solution of acetic acid in water is 1.02 gmL. The molality of the solution is
[2006]
Q.149 Correct
Q.149 In-correct
Q.149 Unattempt
Two solutions of a substance (non electrolyte) are mixed in the following manner: 480mL of 1.5M first solution + 520mL of 1.2M second solution. What is the molarity of the final mixture?
[2005]
Two solutions of a substance (non electrolyte) are mixed in the following manner: 480mL of 1.5M first solution + 520mL of 1.2M second solution. What is the molarity of the final mixture?
[2005]
Q.150 Correct
Q.150 In-correct
Q.150 Unattempt
If we consider that 16, in place of 112, mass of carbon atom as the relative atomic mass unit, the mass of one mole of the substance will
[2005]
If we consider that 16, in place of 112, mass of carbon atom as the relative atomic mass unit, the mass of one mole of the substance will
[2005]
Q.151 Correct
Q.151 In-correct
Q.151 Unattempt
6.02×1020 molecules of urea are present in 100ml of its solution. The concentration of urea solution is
(Avogadro constant, NA=6.02×1023mol1 )
[2004]
6.02×1020 molecules of urea are present in 100ml of its solution. The concentration of urea solution is
(Avogadro constant, NA=6.02×1023mol1 )
[2004]
Q.152 Correct
Q.152 In-correct
Q.152 Unattempt
To neutralise completely 20mL of 0.1M aqueous solution of phosphorous acid (H3PO3), the value of 0.1M aqueous KOH solution required is
[2004]
To neutralise completely 20mL of 0.1M aqueous solution of phosphorous acid (H3PO3), the value of 0.1M aqueous KOH solution required is
[2004]
Q.153 Correct
Q.153 In-correct
Q.153 Unattempt
25mL of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a litre value of 35mL. The molarity of barium hydroxide solution was
[2003]
25mL of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a litre value of 35mL. The molarity of barium hydroxide solution was
[2003]
Q.154 Correct
Q.154 In-correct
Q.154 Unattempt
What volume of hydrogen gas, at 273K and 1atm. pressure will be consumed in obtaining 21.6g of elemental boron (atomic mass =10.8 ) from the reduction of boron trichloride by hydrogen ?
[2003]
What volume of hydrogen gas, at 273K and 1atm. pressure will be consumed in obtaining 21.6g of elemental boron (atomic mass =10.8 ) from the reduction of boron trichloride by hydrogen ?
[2003]
Q.155 Correct
Q.155 In-correct
Q.155 Unattempt
With increase of temperature, which of these changes?
[2002]
With increase of temperature, which of these changes?
[2002]
Q.156 Correct
Q.156 In-correct
Q.156 Unattempt
Number of atoms in 558.5 gram Fe (at. wt. of Fe=55.85gmol1) is
[2002]
Number of atoms in 558.5 gram Fe (at. wt. of Fe=55.85gmol1) is
[2002]
Q.157 Correct
Q.157 In-correct
Q.157 Unattempt
In a compound C,H and N atoms are present in 9:1:3.5 by weight. Molecular weight of compound is 108 . Molecular formula of compound is
[2002]
In a compound C,H and N atoms are present in 9:1:3.5 by weight. Molecular weight of compound is 108 . Molecular formula of compound is
[2002]
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