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## Applications of Equilibrium Constants MCQs

**1. For a reaction aA + bB → cC + dD, which is not in equilibrium the Q**_{C}** is given as __________**

_{C}

a) [A]^{a}[B]^{b}/[C]^{c}[D]^{d}

b) [C]^{c}[D]^{d}/[A]^{a}[B]^{b}

c) [A][B]/[C][D]

d) [C][D]/[A][B]

**Answer: **[C]^{c}[D]^{d}/[A]^{a}[B]^{b}

**2****. What will happen If Q**_{C}** > K**_{C}**?**

_{C}

_{C}

a) Q_{C} decreases till equilibrium

b) Q_{C} increases till equilibrium

c) Q_{C} remains constant

d) cannot say

**Answer: **Q_{C} decreases till equilibrium

**3****. At equilibrium, K**_{C}** is _______________**

_{C}

a) greater than reaction quotient

b) equal to the reaction quotient

c) less than the reaction question

d) independent of reaction question

**Answer: **equal to the reaction quotient

**4****. What do you think will happen if reaction quotient is smaller**** than the equilibrium constant?**

a) equilibrium constant will change

b) reaction quotient remains constant

c) reaction quotient increases continuously

d) reaction quotient increases till K_{C}

**Answer: **reaction quotient increases till K_{C}

**5****. If [H**_{2}**]t=0.10 M, [I**_{2}**]t = 0.20 M and [HI]t = 0.40 M, in the reaction H**_{2(g)}** + I**_{2(g)}** ****⇌**** 2HI**_{(g)}**, what is the value of Q**_{C}**?**

_{2}

_{2}

_{2(g)}

_{2(g)}

_{(g)}

_{C}

a) 8

b) 4

c) 2

d) 1

**Answer: **8

**6. What do you understand from the reaction if reaction quotient is 2 and**** the equilibrium constant is 3?**

a) the equilibrium constant increases

b) the equilibrium constant decreases

c) the equilibrium constant remains the same

d) reaction quotient increases

**Answer: **reaction quotient increases

**7****. Equilibrium constant depends on the tem****perature.**

a) true

b) false

**Answer: **true

**8. If K**_{C}** > 10x, the products predominate over reactant****s. Then what is the value of x?**

_{C}

a) 2

b) 3

c) 4

d) 1

**Answer: **3

**9. What will happen if K**_{C}** > 10**^{-3}** in a chemical reaction?**

_{C}

^{-3}

a) products are predominant

b) reactants are predominant

c) equilibrium

d) dynamic equilibrium

**Answer: **dynamic equilibrium

**10. Reaction quotient is dep****icted by this symbol __________**

a) K

b) Q_{C}

c) R

d) q

**Answer: **Q_{C}