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Equilibrium

AIPMT 2001MCQEasy📈 Topic in 25% papers+4−1
Ques. 1AIPMT 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 CH3COOH molecules.

  1. 3.4 10-4
  2. 3.4 10-3
  3. 6.8 10-4
  4. 6.8 10-3

Answer

(4) 6.8 10-3

Solution

For a weak acid, [H+] = Ka C

⇒ C = [H+]2Ka

= (3.4 10-4)21.7 10-5

= 11.56 10-81.7 10-5

= 6.8 10-3

Answer: (4)

Keep practising — Equilibrium

Ques. 2AIPMT 2001

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
Ques. 3AIPMT 2001

Correct relation between dissociation constants of a dibasic acid is

  1. Ka1 = Ka2
  2. Ka1 > Ka2
  3. Ka1 < Ka2
  4. Ka1 = 1 Ka2
Ques. 4AIPMT 2000

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
Ques. 5AIPMT 2000

Conjugate acid of NH2- is

  1. NH4OH
  2. NH4+
  3. NH2-
  4. NH3
Ques. 6AIPMT 2000

Which statement is wrong about pH and H+?

  1. pH of neutral water is not zero.
  2. Adding 1 N solution of CH3COOH and 1 N solution of NaOH, pH will be seven.
  3. [H+] of dilute and hot H2SO4 is more than concentrated and cold H2SO4
  4. Mixing solution of CH3COOH and HCl. pH will be less than 7.
Ques. 7AIPMT 2000

Equilibrium constant Kp for following reaction MgCO3(s) MgO(s) + CO2(g)

  1. Kp = PCO2
  2. Kp = PCO2 PCO2 PMgOPMgCO3
  3. Kp = PCO2 + PMgOPMgCO3
  4. Kp = PMgCO3PCO2 + PMgO

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