Federal 11th Unit 7 (Chemical Equilibrium)

1. Kc is independent of

a. temperature
b. pressure
c. both temperature and pressure
d. Kp

2. For which of following reaction, Kc has unit of concentration

a. 2A <……..> B
b. A <……..> 2B
c. A <……..> B
d. 3A <……..> 2B

3. For the following reaction 2A + B <……> 3C, we can write

a. K_c > K_p
b. K_c < K_p
c. K_c – K_p =0
d. K_c – K_p = -1

4. When a catalyst is added to an equilibrium mixture, it decreases

a. reverse reaction
b. forward reaction
c. concentration of reaction mixture
d. it has no effect

5. If Ksp = [M⁺²]³ [X^-3]², the chemical formula of compound is

a. MX₂
b. M₂X₃
c. M₃X₂
d. MX

6. NaCl can be purified by passing HCl gas through the …. solution

a. dilute
b. concentrated
c. hot
d. cold

7. Kp = Kc when delta n is equal to

a. 0
b. 1
c. -1
d. 2

8. Consider the following reaction 2SO2 + O2 <……> 25O3 delta H = -198kJ. Yield of SO3 can be increased by

1 increasing pressure 2 increasing temperature 3 adding catalyst 4 increasing concentration of oxygen

a. 1,2
b. 1,3
c. 1,2,3
d. 1,4