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Equilibrium · Question 91

AIPMT 2003MCQEasy📈 Topic in 12% papers+4−1
1

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

  1. Q = Kc
  2. Q < Kc
  3. Q > Kc
  4. Q = 0

Answer

(3) Q > Kc

Solution

As per NCERT:

If Qc < Kc ⇒ the reaction proceeds in the forward direction (left to right).

If Qc > Kc ⇒ the reaction proceeds in the reverse direction (right to left).

If Qc = Kc ⇒ the reaction mixture is at equilibrium.

∵ When Q > Kc there is excess product (NH3), it decomposes to bring Q down to Kc.

Answer: (3)

AIPMT 2003

Keep practising — Equilibrium

2

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. 1.0 10-16
  2. 1.0 10-12
  3. 1.0 10-10
  4. 1.0 10-8
AIPMT 2003
3

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

  1. increase mass of BaO2
  2. increase mass of BaO
  3. increase temperature on equilibrium
  4. increase mass of BaO2 and BaO both
AIPMT 2002
4

Solubility of MX2 type electrolytes is 0.5 10-4 mole/lit., then find out Ksp of electrolytes.

  1. 5 10-12
  2. 25 10-10
  3. 1 10-13
  4. 5 10-13
AIPMT 2002
5

Which has highest pH?

  1. CH3COOK
  2. Na2CO3
  3. NH4Cl
  4. NaNO3
AIPMT 2002
6

Solution of 0.1 N NH4OH and 0.1 N NH4Cl has pH 9.25. Then find out pKb of NH4OH

  1. 9.25
  2. 4.75
  3. 3.75
  4. 8.25
AIPMT 2002
7

In HS-, I-, R-NH2, NH3 order of proton accepting tendency will be

  1. I- > NH3 > R-NH2 > HS-
  2. NH3 > R-NH2 > HS- > I-
  3. R-NH2 > NH3 > HS- > I-
  4. HS- > R-NH2 > NH3 > I-
AIPMT 2001
8

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.

  1. 3.4 10-4
  2. 3.4 10-3
  3. 6.8 10-4
  4. 6.8 10-3
AIPMT 2001
9

Solubility of M2S salt is 3.5 10-6 then find out solubility product.

  1. 1.7 10-6
  2. 1.7 10-16
  3. 1.7 10-18
  4. 1.7 10-12
AIPMT 2001
10

Correct relation between dissociation constants of a dibasic acid is

  1. Ka1 = Ka2
  2. Ka1 > Ka2
  3. Ka1 < Ka2
  4. Ka1 = 1 Ka2
AIPMT 2001
11

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

  1. depends on amount of concentration
  2. unchanged
  3. decrease
  4. increase
AIPMT 2000

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