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Solution
Q.1 Correct
Q.1 In-correct
Q.1 Unattempt

At a given temperature and pressure, the equilibrium constant values for the equilibria are given below:

[NEET 2024 Re]

At a given temperature and pressure, the equilibrium constant values for the equilibria are given below:

[NEET 2024 Re]
Q.2 Correct
Q.2 In-correct
Q.2 Unattempt

For the reaction in equilibrium

Reaction is favoured in forward direction by:

[NEET 2024 Re]

For the reaction in equilibrium

Reaction is favoured in forward direction by:

[NEET 2024 Re]
Q.3 Correct
Q.3 In-correct
Q.3 Unattempt

Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?

[NEET 2024 Re]

Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?

[NEET 2024 Re]
Q.4 Correct
Q.4 In-correct
Q.4 Unattempt

The ratio of solubility of AgCl in 0.1 M KCl solution to the solubility of AgCl in water is:

(Given : Solubility product of AgCl = 10−10)

[NEET 2024 Re]

The ratio of solubility of AgCl in 0.1 M KCl solution to the solubility of AgCl in water is:

(Given : Solubility product of AgCl = 10−10)

[NEET 2024 Re]
Q.5 Correct
Q.5 In-correct
Q.5 Unattempt

In which of the following equilibria, Kp and Kc are NOT equal?

[NEET 2024]

In which of the following equilibria, Kp and Kc are NOT equal?

[NEET 2024]
Q.6 Correct
Q.6 In-correct
Q.6 Unattempt

For the reaction 2A ⇌ B + C, KC = 4 × 10−3. At a given time, the composition of reaction mixture is: [A] = [B] = [C] = 2 × 10−3M.

Then, which of the following is correct?

[NEET 2024]

For the reaction 2A ⇌ B + C, KC = 4 × 10−3. At a given time, the composition of reaction mixture is: [A] = [B] = [C] = 2 × 10−3M.

Then, which of the following is correct?

[NEET 2024]
Q.7 Correct
Q.7 In-correct
Q.7 Unattempt

Consider the following reaction in a sealed vessel at equilibrium with concentrations of

If 0.1 mol LL−1 of NO(g) is taken in a closed vessel, what will be degree of dissociation (α) of NO(g) at equilibrium?

[NEET 2024]

Consider the following reaction in a sealed vessel at equilibrium with concentrations of

If 0.1 mol LL−1 of NO(g) is taken in a closed vessel, what will be degree of dissociation (α) of NO(g) at equilibrium?

[NEET 2024]
Q.8 Correct
Q.8 In-correct
Q.8 Unattempt

The equilibrium concentrations of the species in the reaction A + B ⇌ C + D are 2, 3, 10 and 6mol−1, respectively at 300K.∆G∘ for the reaction is (R = 2cal∕molK)

[NEET 2023]

The equilibrium concentrations of the species in the reaction A + B ⇌ C + D are 2, 3, 10 and 6mol−1, respectively at 300K.∆G∘ for the reaction is (R = 2cal∕molK)

[NEET 2023]
Q.9 Correct
Q.9 In-correct
Q.9 Unattempt

For a weak acid HA, the percentage of dissociation is nearly 1% at equilibrium. If the concentration of acid is 0.1mol L−1, then the correct option for its Ka at the same temperature is :

[NEET 2023 mpr]

For a weak acid HA, the percentage of dissociation is nearly 1% at equilibrium. If the concentration of acid is 0.1mol L−1, then the correct option for its Ka at the same temperature is :

[NEET 2023 mpr]
Q.10 Correct
Q.10 In-correct
Q.10 Unattempt

An acidic buffer is prepared by mixing :

[NEET 2023 mpr]

An acidic buffer is prepared by mixing :

[NEET 2023 mpr]
Q.11 Correct
Q.11 In-correct
Q.11 Unattempt
The pH of the solution containing 50mL each of 0.10M sodium acetate and 0.01M acetic acid is
[Given pKa of CH3COOH=4.57]
[NEET-2022]
The pH of the solution containing 50mL each of 0.10M sodium acetate and 0.01M acetic acid is
[Given pKa of CH3COOH=4.57]
[NEET-2022]

©
Q.12 Correct
Q.12 In-correct
Q.12 Unattempt
3O2(g)⇌2O3(g)
for the above reaction at 298K,Kc is found to be 3.0×10−59. If the concentration of O2 at equilibrium is 0.040M then concentration of O3 in M is
[NEET-2022]
3O2(g)⇌2O3(g)
for the above reaction at 298K,Kc is found to be 3.0×10−59. If the concentration of O2 at equilibrium is 0.040M then concentration of O3 in M is
[NEET-2022]

©
Q.13 Correct
Q.13 In-correct
Q.13 Unattempt
0.01M acetic acid solution is 1% ionised, then pH of this acetic acid solution is:
[NEET Re-2022]
0.01M acetic acid solution is 1% ionised, then pH of this acetic acid solution is:
[NEET Re-2022]

©
Q.14 Correct
Q.14 In-correct
Q.14 Unattempt
Kp for the following reaction is 3.0 at 1000K.
CO2(g)+C(s)⇌2‌CO(g)
What will be the value of Kc for the reaction at the same temperature?
(Given −R=0.083L bar K−1mol−1 )
[NEET Re-2022]
Kp for the following reaction is 3.0 at 1000K.
CO2(g)+C(s)⇌2‌CO(g)
What will be the value of Kc for the reaction at the same temperature?
(Given −R=0.083L bar K−1mol−1 )
[NEET Re-2022]

©
Q.15 Correct
Q.15 In-correct
Q.15 Unattempt
The pKb of dimethylamine and pKa of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethylammonium acetate solution is:
[NEET 2021]

©
The pKb of dimethylamine and pKa of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethylammonium acetate solution is:
[NEET 2021]

©
Q.16 Correct
Q.16 In-correct
Q.16 Unattempt
Hydrolysis of sucrose is given by the following reaction.
Sucrose +H2O⇌ Glucose + Fructose If the equilibrium constant (KC) is 2×1013at 300K, the value of ∆rG⊖ at the same temperature will be :
(2020)

©
Hydrolysis of sucrose is given by the following reaction.
Sucrose +H2O⇌ Glucose + Fructose If the equilibrium constant (KC) is 2×1013at 300K, the value of ∆rG⊖ at the same temperature will be :
(2020)

©
Q.17 Correct
Q.17 In-correct
Q.17 Unattempt
Find out the solubility of Ni(OH)2 in 0.1M NaOH. Given that the ionic product of Ni(OH)2 is 2×10−15
(2020)

©
Find out the solubility of Ni(OH)2 in 0.1M NaOH. Given that the ionic product of Ni(OH)2 is 2×10−15
(2020)

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Q.18 Correct
Q.18 In-correct
Q.18 Unattempt
Which will make basic buffer?
(NEET 2019)

©
Which will make basic buffer?
(NEET 2019)

©
Q.19 Correct
Q.19 In-correct
Q.19 Unattempt
pH of a saturated solution of Ca(OH)2 is 9. The solubility product (Ksp) of Ca(OH)2 is
(NEET 2019)

©
pH of a saturated solution of Ca(OH)2 is 9. The solubility product (Ksp) of Ca(OH)2 is
(NEET 2019)

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Q.20 Correct
Q.20 In-correct
Q.20 Unattempt
Conjugate base for Bronsted acids H2O and HF are
(NEET 2019)

©
Conjugate base for Bronsted acids H2O and HF are
(NEET 2019)

©
Q.21 Correct
Q.21 In-correct
Q.21 Unattempt
The pH of 0.01MNaOH(aq) solution will be
(Odisha NEET 2019)

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The pH of 0.01MNaOH(aq) solution will be
(Odisha NEET 2019)

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Q.22 Correct
Q.22 In-correct
Q.22 Unattempt
Which of the following cannot act both as Bronsted acid and as Bronsted base?
(Odisha NEET 2019)

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Which of the following cannot act both as Bronsted acid and as Bronsted base?
(Odisha NEET 2019)

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Q.23 Correct
Q.23 In-correct
Q.23 Unattempt
The molar solubility of CaF2(Ksp=5.3×10−11) in 0.1 M solution of NaF will be
(Odisha NEET 2019)

©
The molar solubility of CaF2(Ksp=5.3×10−11) in 0.1 M solution of NaF will be
(Odisha NEET 2019)

©
Q.24 Correct
Q.24 In-correct
Q.24 Unattempt
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations:
A. 60mL‌
M
10
HCl+40mL‌
M
10
NaOH
B. 55mL‌
M
10
HCl+45mL‌
M
10
NaOH
C. 75mL‌
M
5
HCl+25mL‌
M
5
NaOH
D. 100mL‌
M
10
HCl+100mL‌
M
10
NaOH
pH of which one of them will be equal to 1?
(NEET 2018)

©
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations:
A. 60mL‌
M
10
HCl+40mL‌
M
10
NaOH
B. 55mL‌
M
10
HCl+45mL‌
M
10
NaOH
C. 75mL‌
M
5
HCl+25mL‌
M
5
NaOH
D. 100mL‌
M
10
HCl+100mL‌
M
10
NaOH
pH of which one of them will be equal to 1?
(NEET 2018)

©
Q.25 Correct
Q.25 In-correct
Q.25 Unattempt
The solubility of BaSO4 in water is 2.42×10−3gL−1 at 298K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO4=233gmol−1)
(NEET 2018)

©
The solubility of BaSO4 in water is 2.42×10−3gL−1 at 298K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO4=233gmol−1)
(NEET 2018)

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Q.26 Correct
Q.26 In-correct
Q.26 Unattempt
Which one of the following conditions will favour maximum formation of the product in the reaction
A2(g)+B2(g)⇌X2(g),∆rH=−XkJ?
(NEE T 2018)

©
Which one of the following conditions will favour maximum formation of the product in the reaction
A2(g)+B2(g)⇌X2(g),∆rH=−XkJ?
(NEE T 2018)

©
Q.27 Correct
Q.27 In-correct
Q.27 Unattempt
The equilibrium constants of the following are
N2+3H2⇌2NH3;K1
N2+O2⇌2NO;K2
H2+‌
1
2
O2⇌H2O;K3
The equilibrium constant (K) of the reaction: 2NH3+‌
5
2
O2
K
⇌
2NO+3H2O will be
(NEET 2017,2007,2003)

©
The equilibrium constants of the following are
N2+3H2⇌2NH3;K1
N2+O2⇌2NO;K2
H2+‌
1
2
O2⇌H2O;K3
The equilibrium constant (K) of the reaction: 2NH3+‌
5
2
O2
K
⇌
2NO+3H2O will be
(NEET 2017,2007,2003)

©
Q.28 Correct
Q.28 In-correct
Q.28 Unattempt
Concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.2×10−4molL−1. Solubility product of Ag2C2O4 is
(NEET 2017)

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Concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.2×10−4molL−1. Solubility product of Ag2C2O4 is
(NEET 2017)

©
Q.29 Correct
Q.29 In-correct
Q.29 Unattempt
A 20 litre container at 400K contains CO2 at pressure 0.4atm and an excess of SrO (neglect the volume of solid SrO ). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its maximum value, will be
(Given that : SrCO3(s)⇌SrO(s)+CO2(g),Kp=1.6‌atm)
(NEET 2017)

©
A 20 litre container at 400K contains CO2 at pressure 0.4atm and an excess of SrO (neglect the volume of solid SrO ). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its maximum value, will be
(Given that : SrCO3(s)⇌SrO(s)+CO2(g),Kp=1.6‌atm)
(NEET 2017)

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Q.30 Correct
Q.30 In-correct
Q.30 Unattempt
The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5NH) in a 0.10M aqueous pyridine solution (Kb‌right. for C5H5N=1.7×10−9) is
(NEET- II 2016)

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The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5NH) in a 0.10M aqueous pyridine solution (Kb‌right. for C5H5N=1.7×10−9) is
(NEET- II 2016)

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Q.31 Correct
Q.31 In-correct
Q.31 Unattempt
The solubility of AgCl(s) with solubility product 1.6×10−10 in 0.1MNaCl solution would be
(NEET-II 2016)

©
The solubility of AgCl(s) with solubility product 1.6×10−10 in 0.1MNaCl solution would be
(NEET-II 2016)

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Q.32 Correct
Q.32 In-correct
Q.32 Unattempt
Which of the following fluoro-compounds is most likely to behave as a Lewis base?
(NEET-II 2016)

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Which of the following fluoro-compounds is most likely to behave as a Lewis base?
(NEET-II 2016)

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Q.33 Correct
Q.33 In-correct
Q.33 Unattempt
MY and NY3, two nearly insoluble salts, have the same Ksp values of 6.2×10−13 at room temperature. Which statement would be true in regard to MY and NY3?
(NEET- I 2016)

©
MY and NY3, two nearly insoluble salts, have the same Ksp values of 6.2×10−13 at room temperature. Which statement would be true in regard to MY and NY3?
(NEET- I 2016)

©
Q.34 Correct
Q.34 In-correct
Q.34 Unattempt
Which one of the following pairs of solution is not an acidic buffer?
(2015)

©
Which one of the following pairs of solution is not an acidic buffer?
(2015)

©
Q.35 Correct
Q.35 In-correct
Q.35 Unattempt
Aqueous solution of which of the following compounds is this best conductor of electric current?
(2015)

©
Aqueous solution of which of the following compounds is this best conductor of electric current?
(2015)

©
Q.36 Correct
Q.36 In-correct
Q.36 Unattempt
What is the pH of the resulting solution when equal volume of 0.1 M NaOH and 0.01 M HCL are mixed?
(2015)

©
What is the pH of the resulting solution when equal volume of 0.1 M NaOH and 0.01 M HCL are mixed?
(2015)

©
Q.37 Correct
Q.37 In-correct
Q.37 Unattempt
If the equilibrium constant for N2(g)+O2(g)⇌2NO(g) is K,the equilibrium constant for
1
2
N2(g)+
1
2
O2(g)⇌NO(g) will be
(2015)

©
If the equilibrium constant for N2(g)+O2(g)⇌2NO(g) is K,the equilibrium constant for
1
2
N2(g)+
1
2
O2(g)⇌NO(g) will be
(2015)

©
Q.38 Correct
Q.38 In-correct
Q.38 Unattempt
If the value of equilibrium constant for a particular reaction is 1.6×1012,then at equilibrium the system will contain
(2015 Cancelled)

©
If the value of equilibrium constant for a particular reaction is 1.6×1012,then at equilibrium the system will contain
(2015 Cancelled)

©
Q.39 Correct
Q.39 In-correct
Q.39 Unattempt
Which of the following statements is correct for a reversible process in a state of equilibrium?
(2015 Cancelled)

©
Which of the following statements is correct for a reversible process in a state of equilibrium?
(2015 Cancelled)

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Q.40 Correct
Q.40 In-correct
Q.40 Unattempt
The Ksp of Ag2CrO4,AgCl,AgBr and AgI are respectively
1.1×10−12,1.8×10−10,5.0×10−13,8.3×10−17
Which or of the following salts will precipitate last if AgNO3 solution added to the solution containing equal moles of NaCl,NaB NaI and Na2CrO4
(2015 Cancelled)
The Ksp of Ag2CrO4,AgCl,AgBr and AgI are respectively
1.1×10−12,1.8×10−10,5.0×10−13,8.3×10−17
Which or of the following salts will precipitate last if AgNO3 solution added to the solution containing equal moles of NaCl,NaB NaI and Na2CrO4
(2015 Cancelled)

©
Q.41 Correct
Q.41 In-correct
Q.41 Unattempt
For a given exothermic reaction,Kp and K′p are the equilibrium constants at temperatures T1 and T2, respectively. Assuming that heat of reaction is constant in temperature range between T1 and T2,it is readily observed that
(2014)

©
For a given exothermic reaction,Kp and K′p are the equilibrium constants at temperatures T1 and T2, respectively. Assuming that heat of reaction is constant in temperature range between T1 and T2,it is readily observed that
(2014)

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Q.42 Correct
Q.42 In-correct
Q.42 Unattempt
For the reversible reaction,
N2(g)+3H2(g)⇌2NH3(g)+heat
The equilibrium shifts in forward direction
(2014)

©
For the reversible reaction,
N2(g)+3H2(g)⇌2NH3(g)+heat
The equilibrium shifts in forward direction
(2014)

©
Q.43 Correct
Q.43 In-correct
Q.43 Unattempt
Using the Gibb’s energy change ΔG° = +63.3 kJ for the following reaction
Ag2CO3(s)⇌2Ag(aq)++CO3(aq)2−
the Ksp of Ag2CO3(s) in water at 25°C is (R = 8.314 J K−1mol−1)
(2014)

©
Using the Gibb’s energy change ΔG° = +63.3 kJ for the following reaction
Ag2CO3(s)⇌2Ag(aq)++CO3(aq)2−
the Ksp of Ag2CO3(s) in water at 25°C is (R = 8.314 J K−1mol−1)
(2014)

©
Q.44 Correct
Q.44 In-correct
Q.44 Unattempt
Which of the following salts will give highest pH in water?
(2014)

©
Which of the following salts will give highest pH in water?
(2014)

©
Q.45 Correct
Q.45 In-correct
Q.45 Unattempt
Which of these is least likely to act as a Lewis base?
(2013 NEET)

©
Which of these is least likely to act as a Lewis base?
(2013 NEET)

©
Q.46 Correct
Q.46 In-correct
Q.46 Unattempt
KMnO4 can be prepared from K2MnO4 as per the reaction,
3MnO42−+2H2O⇌2MnO4−+MnO2+4OH−
The reaction can go to completion by removing OH− ions by adding
(2013 NEET)

©
KMnO4 can be prepared from K2MnO4 as per the reaction,
3MnO42−+2H2O⇌2MnO4−+MnO2+4OH−
The reaction can go to completion by removing OH− ions by adding
(2013 NEET)

©
Q.47 Correct
Q.47 In-correct
Q.47 Unattempt
Accumulation of lactic acid (HC3H5O3),a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10M aqueous solution, lactic acid is 3.7% dissociates. The value of dissociation constant, Ka, for this acid will be
(Karnataka NEET 2013)

©
Accumulation of lactic acid (HC3H5O3),a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10M aqueous solution, lactic acid is 3.7% dissociates. The value of dissociation constant, Ka, for this acid will be
(Karnataka NEET 2013)

©
Q.48 Correct
Q.48 In-correct
Q.48 Unattempt
At 100∘C the Kw of water is 55 times its value at 25∘C. What will be the pH of neutral solution? (log‌55=1.74)
(Karnataka NEET 2013)

©
At 100∘C the Kw of water is 55 times its value at 25∘C. What will be the pH of neutral solution? (log‌55=1.74)
(Karnataka NEET 2013)

©
Q.49 Correct
Q.49 In-correct
Q.49 Unattempt
The values of Ksp of CaCO3 and CaC2O4 are 4.7×10−9 and 1.3×10−9 respectively at 25∘C. If the mixture of these two is washed with water, what is the concentration of Ca2+ ions in water?
(Karnataka NEET 2013)

©
The values of Ksp of CaCO3 and CaC2O4 are 4.7×10−9 and 1.3×10−9 respectively at 25∘C. If the mixture of these two is washed with water, what is the concentration of Ca2+ ions in water?
(Karnataka NEET 2013)

©
Q.50 Correct
Q.50 In-correct
Q.50 Unattempt
The dissociation constant of a weak acid is 1×10−4. In order to prepare a buffer solution with a pH=5, the [ Salt ]/[ Acid ] ratio should be
(Karnataka NEET 2013)

©
The dissociation constant of a weak acid is 1×10−4. In order to prepare a buffer solution with a pH=5, the [ Salt ]/[ Acid ] ratio should be
(Karnataka NEET 2013)

©
Q.51 Correct
Q.51 In-correct
Q.51 Unattempt
Given the reaction between 2 gases represented by A2 and B2 to give the compound AB(g).
A2(g)+B2(g)⇌2AB(g)
At equilibrium the concentration of A2=3.0×10−3 M of B2=4.2×10−3M,of AB=2.8×10−3M
If the reaction takes place in a sealed vessel at 527°C, thenthe value of KC will be
(2012 Mains)

©
Given the reaction between 2 gases represented by A2 and B2 to give the compound AB(g).
A2(g)+B2(g)⇌2AB(g)
At equilibrium the concentration of A2=3.0×10−3 M of B2=4.2×10−3M,of AB=2.8×10−3M
If the reaction takes place in a sealed vessel at 527°C, thenthe value of KC will be
(2012 Mains)

©
Q.52 Correct
Q.52 In-correct
Q.52 Unattempt
Given that the equilibrium constant for the reaction,
2SO2(g)+O2(g)⇌2SO3(g)
has a value of 278 at a particular temperature. What is the value of the equilibrium constant for the following reaction at the same temperature?
SO3(g)⇌SO2(g)+
1
2
O2(g)
(2012 Mains)

©
Given that the equilibrium constant for the reaction,
2SO2(g)+O2(g)⇌2SO3(g)
has a value of 278 at a particular temperature. What is the value of the equilibrium constant for the following reaction at the same temperature?
SO3(g)⇌SO2(g)+
1
2
O2(g)
(2012 Mains)

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Q.53 Correct
Q.53 In-correct
Q.53 Unattempt
Buffer solutions have constant acidity and alkalinity because
(2012)

©
Buffer solutions have constant acidity and alkalinity because
(2012)

©
Q.54 Correct
Q.54 In-correct
Q.54 Unattempt
Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH value?
(2012)

©
Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH value?
(2012)

©
Q.55 Correct
Q.55 In-correct
Q.55 Unattempt
In qualitative analysis, the metals of group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains Ag+ and Pb2+ at a concentration of 0.10 M. Aqueous HCI is added to this solution until the Cl− concentration is 0.10 M. What will the concentrations of Ag+ and Pb2+ be at equilibrium ?
(Ksp for AgCl=1.8×10−10,Ksp for PbCl2=1.7×10−5)
(2011 Mains)

©
In qualitative analysis, the metals of group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains Ag+ and Pb2+ at a concentration of 0.10 M. Aqueous HCI is added to this solution until the Cl− concentration is 0.10 M. What will the concentrations of Ag+ and Pb2+ be at equilibrium ?
(Ksp for AgCl=1.8×10−10,Ksp for PbCl2=1.7×10−5)
(2011 Mains)

©
Q.56 Correct
Q.56 In-correct
Q.56 Unattempt
For the reaction ,N2(g)+O2(g)⇌2NO2(g) the equilibrium constant is K1. The equilibrium constant is K2 for the reaction,
2NO(g)+O2(g)⇌2NO2(g).
What is K for the reaction. NO2(g)⇌
1
2
N2(g)+O2(g)
(2011)

©
For the reaction ,N2(g)+O2(g)⇌2NO2(g) the equilibrium constant is K1. The equilibrium constant is K2 for the reaction,
2NO(g)+O2(g)⇌2NO2(g).
What is K for the reaction. NO2(g)⇌
1
2
N2(g)+O2(g)
(2011)

©
Q.57 Correct
Q.57 In-correct
Q.57 Unattempt
Which of the following is least likely to behave as Lewis base?
(2011)

©
Which of the following is least likely to behave as Lewis base?
(2011)

©
Q.58 Correct
Q.58 In-correct
Q.58 Unattempt
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of NH4+ is 0.20 M.If the equilibrium constant,Kb for NH3 equals 1.8×10−5,what is the pH of this solution ?(log 2.7=0.43)
(2011)

©
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of NH4+ is 0.20 M.If the equilibrium constant,Kb for NH3 equals 1.8×10−5,what is the pH of this solution ?(log 2.7=0.43)
(2011)

©
Q.59 Correct
Q.59 In-correct
Q.59 Unattempt
The value of ΔH for the reaction,
X2(g)+4Y2(g)⇌2XY4(g) is less than zero,Formation of XY4(g) will be favoured at
(2011)

©
The value of ΔH for the reaction,
X2(g)+4Y2(g)⇌2XY4(g) is less than zero,Formation of XY4(g) will be favoured at
(2011)

©
Q.60 Correct
Q.60 In-correct
Q.60 Unattempt
The reaction, 2A(g)+B(g)⇌3C(g)+D(g) is begun with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of D is measured and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression
(2010 Mains)

©
The reaction, 2A(g)+B(g)⇌3C(g)+D(g) is begun with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of D is measured and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression
(2010 Mains)

©
Q.61 Correct
Q.61 In-correct
Q.61 Unattempt
In a buffer solution containing equal concentration of B− and HB,the Kb for B− is 10−10.The pH of buffer solution is
(2010)

©
In a buffer solution containing equal concentration of B− and HB,the Kb for B− is 10−10.The pH of buffer solution is
(2010)

©
Q.62 Correct
Q.62 In-correct
Q.62 Unattempt
In which of the following equilibrium Kc and Kp are not equal ?
(2010)

©
In which of the following equilibrium Kc and Kp are not equal ?
(2010)

©
Q.63 Correct
Q.63 In-correct
Q.63 Unattempt
What is [H+] is mol/L of a solution that is 0.20 M in CH3COONa and 0.10M in CH3COOH? Ka for CH3COOH=1.8×10−5
(2010)

©
What is [H+] is mol/L of a solution that is 0.20 M in CH3COONa and 0.10M in CH3COOH? Ka for CH3COOH=1.8×10−5
(2010)

©
Q.64 Correct
Q.64 In-correct
Q.64 Unattempt
If pH of a saturated solution of Ba(OH)2 is 12,the value of its Ksp is
(2010,2012)

©
If pH of a saturated solution of Ba(OH)2 is 12,the value of its Ksp is
(2010,2012)

©
Q.65 Correct
Q.65 In-correct
Q.65 Unattempt
What is the [OH−] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.01 M Ba(OH)2
(2009)

©
What is the [OH−] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.01 M Ba(OH)2
(2009)

©
Q.66 Correct
Q.66 In-correct
Q.66 Unattempt
The ionization constant of ammonium hydroxide is 1.77×10−5 at 298 K. Hydrolysis constant of ammonium chloride is
(2009)

©
The ionization constant of ammonium hydroxide is 1.77×10−5 at 298 K. Hydrolysis constant of ammonium chloride is
(2009)

©
Q.67 Correct
Q.67 In-correct
Q.67 Unattempt
Which of the following molecules acts as a Lewis acid?
(2009)

©
Which of the following molecules acts as a Lewis acid?
(2009)

©
Q.68 Correct
Q.68 In-correct
Q.68 Unattempt
The dissociation constants for acetic acid and HCN at 25 are 1.5×10−5 and 4.5×10−10 respectively.The equilibrium constant for the equilibrium,
CN−+CH3COOH⇌HCN+CH3COO−
would be
(2009)

©
The dissociation constants for acetic acid and HCN at 25 are 1.5×10−5 and 4.5×10−10 respectively.The equilibrium constant for the equilibrium,
CN−+CH3COOH⇌HCN+CH3COO−
would be
(2009)

©
Q.69 Correct
Q.69 In-correct
Q.69 Unattempt
The values of Kp1 and Kp2 for the reactions
X⇌Y+Z.........(1)
A ⇌ 2B..............(2)
are in the ratio 9 : 1. If degree of dissociation of X and be equal, then total pressure at equilibrium (1) and (2) in the ratio
(2008)

©
The values of Kp1 and Kp2 for the reactions
X⇌Y+Z.........(1)
A ⇌ 2B..............(2)
are in the ratio 9 : 1. If degree of dissociation of X and be equal, then total pressure at equilibrium (1) and (2) in the ratio
(2008)

©
Q.70 Correct
Q.70 In-correct
Q.70 Unattempt
The value of equilibrium constant of the reaction:
HI(g)⇌
1
2
H2(g)+
1
2
I2(g) is 8.0.The equilibrium constant of the reaction
H2(g)+I2(g)⇌2HI(g) will be
(2008)

©
The value of equilibrium constant of the reaction:
HI(g)⇌
1
2
H2(g)+
1
2
I2(g) is 8.0.The equilibrium constant of the reaction
H2(g)+I2(g)⇌2HI(g) will be
(2008)

©
Q.71 Correct
Q.71 In-correct
Q.71 Unattempt
Equal volumes of three acid solutions of pH 3, 4 and 5 mixed in a vessel. What will be the H+ ion concentration the mixture?
(2008)

©
Equal volumes of three acid solutions of pH 3, 4 and 5 mixed in a vessel. What will be the H+ ion concentration the mixture?
(2008)

©
Q.72 Correct
Q.72 In-correct
Q.72 Unattempt
If the concentration of OH− ions in the reaction
Fe(OH)3(g)⇌Fe3+(aq)+3OH−(aq)
is decreased by 1/4 times, then equilibrium concentration of will increase by
(2008)

©
If the concentration of OH− ions in the reaction
Fe(OH)3(g)⇌Fe3+(aq)+3OH−(aq)
is decreased by 1/4 times, then equilibrium concentration of will increase by
(2008)

©
Q.73 Correct
Q.73 In-correct
Q.73 Unattempt
The dissociation equilibrium of a gas AB2 can be represented as:
2AB2(g)⇌2AB(g)+B2(g)
The degree of dissociation is x and is small compared The expression relating the degree of dissociation (x) equilibrium constant KP and total pressure P is
(2008)

©
The dissociation equilibrium of a gas AB2 can be represented as:
2AB2(g)⇌2AB(g)+B2(g)
The degree of dissociation is x and is small compared The expression relating the degree of dissociation (x) equilibrium constant KP and total pressure P is
(2008)

©
Q.74 Correct
Q.74 In-correct
Q.74 Unattempt
Calculate the pOH of a solution at 25°C that contains 1×10−10M of hydronium ions i.e. H3O+
(2007)

©
Calculate the pOH of a solution at 25°C that contains 1×10−10M of hydronium ions i.e. H3O+
(2007)

©
Q.75 Correct
Q.75 In-correct
Q.75 Unattempt
The following equilibrium constants are given:
N2+3H2⇌2NH3;K1
N2+O2⇌2NO;K2
H2+
1
2
O2⇌H2O;K3
The equilibrium constant for the oxidation of NH3 by oxygen to give NO is
(2007)

©
The following equilibrium constants are given:
N2+3H2⇌2NH3;K1
N2+O2⇌2NO;K2
H2+
1
2
O2⇌H2O;K3
The equilibrium constant for the oxidation of NH3 by oxygen to give NO is
(2007)

©
Q.76 Correct
Q.76 In-correct
Q.76 Unattempt
A weak acid, HA, has a Ka of 1.00×10−5. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to
(2007)

©
A weak acid, HA, has a Ka of 1.00×10−5. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to
(2007)

©
Q.77 Correct
Q.77 In-correct
Q.77 Unattempt
The hydrogen ion concentration of a 10−8M HCl aqueous solution at 298K (Kw=10−14)
(2006)

©
The hydrogen ion concentration of a 10−8M HCl aqueous solution at 298K (Kw=10−14)
(2006)

©
Q.78 Correct
Q.78 In-correct
Q.78 Unattempt
Which of the following pairs constitutes a buffer?
(2006)

©
Which of the following pairs constitutes a buffer?
(2006)

©
Q.79 Correct
Q.79 In-correct
Q.79 Unattempt
For the reaction:
CH4(g)+2O2(g)⇌CO2(g)+2H2O(l),
ΔHr=−170.8kJmol−1.
Which of the following statements is not true?
(2006)

©
For the reaction:
CH4(g)+2O2(g)⇌CO2(g)+2H2O(l),
ΔHr=−170.8kJmol−1.
Which of the following statements is not true?
(2006)

©
Q.80 Correct
Q.80 In-correct
Q.80 Unattempt
At 25∘C, the dissociation constant of a base, BOH, is 1.0×10−12. The concentration of hydroxyl ions in 0.01M aqueous solution of the base would be
(2005)

©
At 25∘C, the dissociation constant of a base, BOH, is 1.0×10−12. The concentration of hydroxyl ions in 0.01M aqueous solution of the base would be
(2005)

©
Q.81 Correct
Q.81 In-correct
Q.81 Unattempt
H2S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because
(2005)
H2S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because
(2005)

©
Q.82 Correct
Q.82 In-correct
Q.82 Unattempt
Equilibrium constants K1 and K2 for the following equilibria:
NO(g)+‌
1
2
O2(g)
K1
⇌
NO2(g) and
2NO(g)
K2
⇌
2NO2(g)+O2(g) are related as
(2005)

©
Equilibrium constants K1 and K2 for the following equilibria:
NO(g)+‌
1
2
O2(g)
K1
⇌
NO2(g) and
2NO(g)
K2
⇌
2NO2(g)+O2(g) are related as
(2005)

©
Q.83 Correct
Q.83 In-correct
Q.83 Unattempt
The solubility product of a sparingly soluble salt AX2 is 3.2×10−11. Its solubility (in moles/L) is
(2004)

©
The solubility product of a sparingly soluble salt AX2 is 3.2×10−11. Its solubility (in moles/L) is
(2004)

©
Q.84 Correct
Q.84 In-correct
Q.84 Unattempt
The rapid change of pH near the stoichiometric point of an acid-base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid (HIn) and base (In−) forms of the indicator by the expression
(2004)

©
The rapid change of pH near the stoichiometric point of an acid-base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid (HIn) and base (In−) forms of the indicator by the expression
(2004)

©
Q.85 Correct
Q.85 In-correct
Q.85 Unattempt
In Haber process 30 litres of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of the expected product. What will be the composition of gaseous mixture under the aforesaid condition in the end?
(2003)

©
In Haber process 30 litres of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of the expected product. What will be the composition of gaseous mixture under the aforesaid condition in the end?
(2003)

©
Q.86 Correct
Q.86 In-correct
Q.86 Unattempt
The reaction quotient ( Q ) for the reaction N2+3H2(g)⇌2NH3(g) is given by Q=‌
[NH3]2
[N2][H2]3
. The reaction will proceed from right to left if
where Kc is the equilibrium constant.
(2003)

©
The reaction quotient ( Q ) for the reaction N2+3H2(g)⇌2NH3(g) is given by Q=‌
[NH3]2
[N2][H2]3
. The reaction will proceed from right to left if
where Kc is the equilibrium constant.
(2003)

©
Q.87 Correct
Q.87 In-correct
Q.87 Unattempt
Which one of the following statements is not true?
(2003)

©
Which one of the following statements is not true?
(2003)

©
Q.88 Correct
Q.88 In-correct
Q.88 Unattempt
The solubility product of AgI at 25∘C is 1.0×10−16mol2L−2. The solubility of AgI in 10−4N solution of KI at 25∘C is approximately (in mol L−1 )
(2003)

©
The solubility product of AgI at 25∘C is 1.0×10−16mol2L−2. The solubility of AgI in 10−4N solution of KI at 25∘C is approximately (in mol L−1 )
(2003)

©
Q.89 Correct
Q.89 In-correct
Q.89 Unattempt
Reaction
BaO2(s)⇌BaO(s)+O2(g);∆H=+ve
In equilibrium condition, pressure of O2 depends on
(2002)

©
Reaction
BaO2(s)⇌BaO(s)+O2(g);∆H=+ve
In equilibrium condition, pressure of O2 depends on
(2002)

©
Q.90 Correct
Q.90 In-correct
Q.90 Unattempt
Solubility of MX2 type electrolytes is 0.5×10−4‌mole‌/‌lit., then find out Ksp of electrolytes.
(2002)

©
Solubility of MX2 type electrolytes is 0.5×10−4‌mole‌/‌lit., then find out Ksp of electrolytes.
(2002)

©
Q.91 Correct
Q.91 In-correct
Q.91 Unattempt
Which has highest pH?
(2002)

©
Which has highest pH?
(2002)

©
Q.92 Correct
Q.92 In-correct
Q.92 Unattempt
Solution of 0.1NNH4OH and 0.1NNH4Cl has pH 9.25. Then find out pKb of NH4OH .
(2002)

©
Solution of 0.1NNH4OH and 0.1NNH4Cl has pH 9.25. Then find out pKb of NH4OH .
(2002)

©
Q.93 Correct
Q.93 In-correct
Q.93 Unattempt
In HS−,I−,R−NH2,NH3 order of proton accepting tendency will be
(2001)

©
In HS−,I−,R−NH2,NH3 order of proton accepting tendency will be
(2001)

©
Q.94 Correct
Q.94 In-correct
Q.94 Unattempt
Ionisation constant of CH3COOH is 1.7×10−5 and concentration of H+ ions is 3.4×10−4. Then find out initial concentration of CH3 COOH molecules.
(2001)

©
Ionisation constant of CH3COOH is 1.7×10−5 and concentration of H+ ions is 3.4×10−4. Then find out initial concentration of CH3 COOH molecules.
(2001)

©
Q.95 Correct
Q.95 In-correct
Q.95 Unattempt
Solubility of M2S salt is 3.5×10−6 then find out solubility product.
(2001)

©
Solubility of M2S salt is 3.5×10−6 then find out solubility product.
(2001)

©
Q.96 Correct
Q.96 In-correct
Q.96 Unattempt
Correct relation between dissociation constants of a dibasic acid is
(2000)

©
Correct relation between dissociation constants of a dibasic acid is
(2000)

©
Q.97 Correct
Q.97 In-correct
Q.97 Unattempt
For any reversible reaction, if we increase concentration of the reactants, then effect on equilibrium constant
(2000)

©
For any reversible reaction, if we increase concentration of the reactants, then effect on equilibrium constant
(2000)

©
Q.98 Correct
Q.98 In-correct
Q.98 Unattempt
Conjugate acid of NH2− is
(2000)
©
Conjugate acid of NH2− is
(2000)
©
Q.99 Correct
Q.99 In-correct
Q.99 Unattempt
Which statement is wrong about pH and H+ ?
(2000)
©
Which statement is wrong about pH and H+ ?
(2000)
©
Q.100 Correct
Q.100 In-correct
Q.100 Unattempt
Equilibrium constant Kp for following reaction MgCO3(s)⇌MgO(s)+CO2(s)
(2000)

©
Equilibrium constant Kp for following reaction MgCO3(s)⇌MgO(s)+CO2(s)
(2000)

©
Q.101 Correct
Q.101 In-correct
Q.101 Unattempt
The strongest conjugate base is
(1999)

©
The strongest conjugate base is
(1999)

©
Q.102 Correct
Q.102 In-correct
Q.102 Unattempt
The concentration of [H+] and concentration of [OH−] of a 0.1 aqueous solution of 2% ionised weak acid is [ionic product of water =1×10−14]
(1999)

©
The concentration of [H+] and concentration of [OH−] of a 0.1 aqueous solution of 2% ionised weak acid is [ionic product of water =1×10−14]
(1999)

©
Q.103 Correct
Q.103 In-correct
Q.103 Unattempt
The solubility of a saturated solution of calcium fluoride is 2×10−4 moles per litre. Its solubility product is
(1999)

©
The solubility of a saturated solution of calcium fluoride is 2×10−4 moles per litre. Its solubility product is
(1999)

©
Q.104 Correct
Q.104 In-correct
Q.104 Unattempt
If K1 and K2 are the respective equilibrium constants for the two reactions,
XeF6+H2O(g)→XeOF4(g)+2HF(g) XeO4(g)+XeF6(g)→XeOF4(g)+XeO3F2(g)
the equilibrium constant of the reaction,
XeO4(g)+2HF(g)→XeO3F2(g)+H2O(g)
will be
(1998)

©
If K1 and K2 are the respective equilibrium constants for the two reactions,
XeF6+H2O(g)→XeOF4(g)+2HF(g) XeO4(g)+XeF6(g)→XeOF4(g)+XeO3F2(g)
the equilibrium constant of the reaction,
XeO4(g)+2HF(g)→XeO3F2(g)+H2O(g)
will be
(1998)

©
Q.105 Correct
Q.105 In-correct
Q.105 Unattempt
A physician wishes to prepare a buffer solution at pH=3.85 that efficiently resists changes in pH yet contains only small concentration of the buffering agents. Which of the following weak acids together with its sodium salt would be best to use?
(1997)

©
A physician wishes to prepare a buffer solution at pH=3.85 that efficiently resists changes in pH yet contains only small concentration of the buffering agents. Which of the following weak acids together with its sodium salt would be best to use?
(1997)

©
Q.106 Correct
Q.106 In-correct
Q.106 Unattempt
The hydride ion H− is stronger base than its hydroxide ion OH−. Which of the following reaction will occur if sodium hydride (NaH) is dissolved in water?
(1997)

©
The hydride ion H− is stronger base than its hydroxide ion OH−. Which of the following reaction will occur if sodium hydride (NaH) is dissolved in water?
(1997)

©
Q.107 Correct
Q.107 In-correct
Q.107 Unattempt
The solubility product of CuS,Ag2S and HgS are 10−31,10−44 and 10−54 respectively. The solubilities of these sulphides are in the order
(1997)

©
The solubility product of CuS,Ag2S and HgS are 10−31,10−44 and 10−54 respectively. The solubilities of these sulphides are in the order
(1997)

©
Q.108 Correct
Q.108 In-correct
Q.108 Unattempt
The equilibrium constant for the reaction N2+3H2⇌2NH3 is K, then the equilibrium constant for the equilibrium 2NH3⇌N2+3H2 is
(1996)

©
The equilibrium constant for the reaction N2+3H2⇌2NH3 is K, then the equilibrium constant for the equilibrium 2NH3⇌N2+3H2 is
(1996)

©
Q.109 Correct
Q.109 In-correct
Q.109 Unattempt
The ionic product of water at 25∘C is 10−14 Its ionic product at 90∘C will be,
(1996)

©
The ionic product of water at 25∘C is 10−14 Its ionic product at 90∘C will be,
(1996)

©
Q.110 Correct
Q.110 In-correct
Q.110 Unattempt
If α is dissociation constant, then the total number of moles for the reaction, 2HI→H2+I2 will be
(1996)

©
If α is dissociation constant, then the total number of moles for the reaction, 2HI→H2+I2 will be
(1996)

©
Q.111 Correct
Q.111 In-correct
Q.111 Unattempt
The pH value of N/10NaOH solution is
(1996)

©
The pH value of N/10NaOH solution is
(1996)

©
Q.112 Correct
Q.112 In-correct
Q.112 Unattempt
Which of the following is not a Lewis acid?
(1996)

©
Which of the following is not a Lewis acid?
(1996)

©
Q.113 Correct
Q.113 In-correct
Q.113 Unattempt
The pH value of blood does not appreciably change by a small addition of an acid or a base, because the blood
(1995)

©
The pH value of blood does not appreciably change by a small addition of an acid or a base, because the blood
(1995)

©
Q.114 Correct
Q.114 In-correct
Q.114 Unattempt
The pH value of a 10M solution of HCl is
(1995)

©
The pH value of a 10M solution of HCl is
(1995)

©
Q.115 Correct
Q.115 In-correct
Q.115 Unattempt
The solubility of AgCl will be minimum in
(1995)

©
The solubility of AgCl will be minimum in
(1995)

©
Q.116 Correct
Q.116 In-correct
Q.116 Unattempt
In liquid-gas equilibrium, the pressure of vapours above the liquid is constant at
(1995)

©
In liquid-gas equilibrium, the pressure of vapours above the liquid is constant at
(1995)

©
Q.117 Correct
Q.117 In-correct
Q.117 Unattempt
Which one of the following is most soluble?
(1994)

©
Which one of the following is most soluble?
(1994)

©
Q.118 Correct
Q.118 In-correct
Q.118 Unattempt
At 80∘C, distilled water has [H3O+] concentration equal to 1×10−6 mole/litre. The value of Kw at this temperature will be
(1994)

©
At 80∘C, distilled water has [H3O+] concentration equal to 1×10−6 mole/litre. The value of Kw at this temperature will be
(1994)

©
Q.119 Correct
Q.119 In-correct
Q.119 Unattempt
According to Le Chatelier's principle, adding heat to a solid and liquid in equilibrium will cause the
(1993)

©
According to Le Chatelier's principle, adding heat to a solid and liquid in equilibrium will cause the
(1993)

©
Q.120 Correct
Q.120 In-correct
Q.120 Unattempt
0.1 M solution of which one of these substances will act basic?
(1992)

©
0.1 M solution of which one of these substances will act basic?
(1992)

©
Q.121 Correct
Q.121 In-correct
Q.121 Unattempt
Which one of the following information can be obtained on the basis of Le Chatelier principle?
(1992)

©
Which one of the following information can be obtained on the basis of Le Chatelier principle?
(1992)

©
Q.122 Correct
Q.122 In-correct
Q.122 Unattempt
Aqueous solution of acetic acid contains
(1991)

©
Aqueous solution of acetic acid contains
(1991)

©
Q.123 Correct
Q.123 In-correct
Q.123 Unattempt
K1 and K2 are equilibrium constant for reactions (i) and (ii) N2(g)+O2(g)⇌2NO(g)....(i)
NO(g)⇌‌
1
2
N2(g)+‌
1
2
O2(g)....(ii)
(1989)

©
K1 and K2 are equilibrium constant for reactions (i) and (ii) N2(g)+O2(g)⇌2NO(g)....(i)
NO(g)⇌‌
1
2
N2(g)+‌
1
2
O2(g)....(ii)
(1989)

©
Q.124 Correct
Q.124 In-correct
Q.124 Unattempt
The compound whose water solution has the highest pH is
(1988)

©
The compound whose water solution has the highest pH is
(1988)

©
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