41. Kc changes when: A) Pressure changes B) Temperature changes C) Concentration changes D) Volume changes Answer: B
42. In equilibrium, free energy change is: A) Positive B) Negative C) Zero D) Infinite Answer: C
43. If ΔG < 0, reaction is: A) Non-spontaneous B) Spontaneous C) At equilibrium D) Reversible Answer: B
44. If ΔG > 0, reaction is:
A) Spontaneous
B) Non-spontaneous
C) At equilibrium
D) Fast
Answer: B
45. If Q = K, system is:
A) Not started
B) At equilibrium
C) Moving forward
D) Moving backward
Answer: B
46. Adding inert gas at constant volume:
A) Shifts equilibrium
B) No effect
C) Stops reaction
D) Changes K
Answer: B
47. For exothermic reaction, heat acts as:
A) Reactant
B) Product
C) Catalyst
D) Solvent
Answer: B
48. Reaction quotient is denoted by: A) K B) Q C) R D) P Answer: B
49. If Q < K, reaction shifts: A) Left B) Right C) No change D) Stops Answer: B
50. For endothermic reaction, heat acts as:
A) Reactant
B) Product
C) Catalyst
D) Gas
Answer: A