Kp And Kc Relationship And Characteristics Of K MCQs
31. For a gaseous reaction, if Δn = -1, the relationship between Kp and Kc is:
- A) ( Kp = Kc \times RT )
- B) ( Kp = Kc/(RT) )
- C) ( Kp = Kc/(RT)^2 )
- D) ( Kp = Kc \times (RT)^2 )
- Answer: B
32. The value of Kp for the reaction ( 2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g) ) at 300 K is 3. If Δn = -1, the value of Kc at the same temperature is:
- A) Greater than Kp
- B) Less than Kp
- C) Equal to Kp
- D) Cannot be determined
- Answer: A
33. Which of the following conditions will NOT affect the value of Kc?
- A) Temperature
- B) Initial concentration of reactants
- C) Pressure
- D) Volume
- Answer: B
34. The equilibrium constant for an exothermic reaction will decrease if:
- A) The temperature is increased
- B) The pressure is decreased
- C) The concentration of products is increased
- D) The concentration of reactants is increased
- Answer: A
35. What happens to the equilibrium constant K if a catalyst is added to a reaction?
- A) Increases
- B) Decreases
- C) Remains the same
- D) Depends on the catalyst
- Answer: C
36. Kp will be greater than Kc if:
- A) Δn is positive
- B) Δn is negative
- – C) Δn is zero
- D) The reaction is endothermic
- Answer: A
37. Which of the following reactions has Kp = Kc?
- A) ( CO(g) + H_2O(g) \rightleftharpoons CO_2(g) + H_2(g) )
- B) ( H_2(g) + I_2(g) \rightleftharpoons 2HI(g) )
- C) ( 2NO_2(g) \rightleftharpoons N_2O_4(g) )
- D) ( 2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g) )
- Answer: B
38. For an endothermic reaction, if the temperature is increased, the value of K will:
- A) Decrease
- B) Increase
- C) Remain unchanged
- D) Depend on pressure
- Answer: B
39. The value of Kc for a reaction:
- A) Is always greater than 1
- B) Is always less than 1
- C) Can be less than, greater than, or equal to 1
- D) Depends on the concentration of reactants
- Answer: C
40. What happens to Kp if the total pressure of a system is doubled?
- A) Increases
- B) Decreases
- C) Remains constant
- D) Depends on Δn
- Answer: C