91
The reaction quotient (Q) for the reaction N2(g) + 3H2(g) 2NH3(g) is given by Q = [NH3]2[N2][H2]3. The reaction will proceed from right to left if
- Q = Kc
- Q < Kc
- Q > Kc
- Q = 0
AIPMT 2003
Equilibrium
Previous year questions with solutions · 2000 – 2026
104Questions
36Papers covered
4.44% ↓33.3%Weightage in 2026
’00
’01
’02
’03
’04
’05
’06
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’09
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’13
’14
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’19
’20
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’26
Year-wise statistics questions · papers · average per paper · weightage
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 4 | 2 | 2 | 4.44% ↓33.3% |
| 2025 | 3 | 1 | 3 | 6.67% ↑12.2% |
| 2024 | 6 | 2 | 3 | 5.94% ↑51.5% |
| 2023 | 2 | 1 | 2 | 3.92% ↓20.8% |
| 2022 | 5 | 2 | 2.5 | 4.95% ↑147.5% |
| 2021 | 1 | 1 | 1 | 2.00% ↓55% |
| 2020 | 2 | 1 | 2 | 4.44% ↓33.3% |
| 2019 | 3 | 1 | 3 | 6.67% →0% |
| 2018 | 3 | 1 | 3 | 6.67% →0% |
| 2017 | 3 | 1 | 3 | 6.67% ↑20% |
| 2016 | 5 | 2 | 2.5 | 5.56% →0% |
| 2015 | 5 | 2 | 2.5 | 5.56% ↓37.5% |
| 2014 | 4 | 1 | 4 | 8.89% ↑31.9% |
| 2013 | 6 | 2 | 3 | 6.74% ↑7.9% |
| 2012 | 5 | 2 | 2.5 | 6.25% ↑1.3% |
| 2011 | 5 | 2 | 2.5 | 6.17% ↓1.2% |
| 2010 | 5 | 2 | 2.5 | 6.25% ↓20.3% |
| 2009 | 4 | 1 | 4 | 7.84% ↓33.3% |
| 2008 | 6 | 1 | 6 | 11.76% ↑47.1% |
| 2007 | 4 | 1 | 4 | 8.00% ↑33.3% |
| 2006 | 3 | 1 | 3 | 6.00% →0% |
| 2005 | 3 | 1 | 3 | 6.00% ↑44% |
| 2004 | 2 | 1 | 2 | 4.17% ↓31.9% |
| 2003 | 3 | 1 | 3 | 6.12% ↓23.5% |
| 2002 | 4 | 1 | 4 | 8.00% ↑2% |
| 2001 | 4 | 1 | 4 | 7.84% →0% |
| 2000 | 4 | 1 | 4 | 7.84% |
⚠ 1 of these questions are out of the current syllabus (marked on the question).
92
The solubility product of AgI at 25 C is 1.0 10-16 mol2 L-2. The solubility of AgI in 10-4 N solution of KI at 25 C is approximately (in mol L-1)
- 1.0 10-16
- 1.0 10-12
- 1.0 10-10
- 1.0 10-8
AIPMT 2003
93
Reaction BaO2(s) BaO(s) + O2(g); H = +ve. In equilibrium condition, pressure of O2 depends on
- increase mass of BaO2
- increase mass of BaO
- increase temperature on equilibrium
- increase mass of BaO2 and BaO both
AIPMT 2002
94
Solubility of MX2 type electrolytes is 0.5 10-4 mole/lit., then find out Ksp of electrolytes.
- 5 10-12
- 25 10-10
- 1 10-13
- 5 10-13
AIPMT 2002
95
Which has highest pH?
- CH3COOK
- Na2CO3
- NH4Cl
- NaNO3
AIPMT 2002
96
Solution of 0.1 N NH4OH and 0.1 N NH4Cl has pH 9.25. Then find out pKb of NH4OH
- 9.25
- 4.75
- 3.75
- 8.25
AIPMT 2002
97
In HS-, I-, R-NH2, NH3 order of proton accepting tendency will be
- I- > NH3 > R-NH2 > HS-
- NH3 > R-NH2 > HS- > I-
- R-NH2 > NH3 > HS- > I-
- HS- > R-NH2 > NH3 > I-
AIPMT 2001
98
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 CH3COOH molecules.
- 3.4 10-4
- 3.4 10-3
- 6.8 10-4
- 6.8 10-3
AIPMT 2001
99
Solubility of M2S salt is 3.5 10-6 then find out solubility product.
- 1.7 10-6
- 1.7 10-16
- 1.7 10-18
- 1.7 10-12
AIPMT 2001
100
Correct relation between dissociation constants of a dibasic acid is
- Ka1 = Ka2
- Ka1 > Ka2
- Ka1 < Ka2
- Ka1 = 1 Ka2
AIPMT 2001
101
For any reversible reaction, if we increase concentration of the reactants, then effect on equilibrium constant
- depends on amount of concentration
- unchanged
- decrease
- increase
AIPMT 2000
102
Conjugate acid of NH2- is
- NH4OH
- NH4+
- NH2-
- NH3
AIPMT 2000
103
Which statement is wrong about pH and H+?
- pH of neutral water is not zero.
- Adding 1 N solution of CH3COOH and 1 N solution of NaOH, pH will be seven.
- [H+] of dilute and hot H2SO4 is more than concentrated and cold H2SO4
- Mixing solution of CH3COOH and HCl. pH will be less than 7.
AIPMT 2000
104
Equilibrium constant Kp for following reaction MgCO3(s) MgO(s) + CO2(g)
- Kp = PCO2
- Kp = PCO2 PCO2 PMgOPMgCO3
- Kp = PCO2 + PMgOPMgCO3
- Kp = PMgCO3PCO2 + PMgO
AIPMT 2000