51. Equilibrium is established fastest when:
A) Catalyst is present
B) Temperature is low
C) Pressure is low
D) Volume is large
Answer: A
52. Which factor affects both rate and equilibrium?
A) Catalyst
B) Temperature
C) Pressure
D) Concentration
Answer: B
53. The equilibrium constant for a reaction doubled is:
A) Same
B) Squared
C) Halved
D) Doubled
Answer: B
54. If reaction is reversed, K becomes:
A) Same
B) Inverse
C) Squared
D) Doubled
Answer: B
55. If coefficients are halved, new K is:
A) K²
B) √K
C) 1/K
D) 2K
Answer: B
56. Which species are omitted in K expression?
A) Solids and liquids
B) Gases
C) Aqueous
D) All
Answer: A
57. Equilibrium shifts when:
A) Catalyst added
B) Temperature changes
C) Time increases
D) System isolated
Answer: B
58. Increasing concentration of reactants causes:
A) Shift left
B) Shift right
C) No effect
D) Stop
Answer: B
59. Equilibrium constant is dimensionless when:
A) Δn = 1
B) Δn = 0
C) Δn = 2
D) Δn ≠ 0
Answer: B
60. Reaction quotient at equilibrium is:
A) Zero
B) One
C) Equal to K
D) Infinite
Answer: C