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CHEMICAL KINETICS MCQs

Total Questions : 25 | Page 2 of 3 pages
Question 11. What is the degree of the following chemical reaction?4Al + 3O2 → 2Al2O3
  1.    4
  2.    5
  3.    6
  4.    7
 Discuss Question
Answer: Option D. -> 7
Question 12. What does [ ] denote?
  1.    concentration, M
  2.    concentration, m
  3.    concentration, mass %
  4.    squared
 Discuss Question
Answer: Option A. -> concentration, M
Question 13. The first order rate constant for the decomposition of 0
  1.    1.5 min
  2.    8.3 min
  3.    23.1 min
  4.    66.7 min
 Discuss Question
Answer: Option C. -> 23.1 min
Question 14. When following system is disturbed by addition of Oxygen gas to the system container how does concentration of SO2 change?2SO2(g) + O2(g) ↔ 2SO3(g) ΔH= +9kj/mol
  1.    Increase
  2.    Deacrease
  3.    No change
  4.    Both A & B
 Discuss Question
Answer: Option B. -> Deacrease
Question 15. To measure rate of reaction, we can monitor change in which of the following?
  1.    Reactants only
  2.    Products only
  3.    Reactants or products
  4.    Both A & B
 Discuss Question
Answer: Option C. -> Reactants or products
Question 16. Which of the following is expressions represents correctly rate of following reaction?X + Y → Z + Q ΔH = +22kj/mol
  1.    Rate = +Δ[X] / Δt
  2.    Rate = +Δ[Y] / Δt
  3.    Rate = +Δ[Z] / Δt
  4.    Rate = -Δ[Q] / Δt
 Discuss Question
Answer: Option C. -> Rate = +Δ[Z] / Δt
Question 17. When following system is disturbed by addition of catalyst to the system container how does concentration of O2 change?2SO2(g) + O2(g) ↔ 2SO3(g) ΔH= +9kj/mol
  1.    Increase
  2.    Deacrease
  3.    No change
  4.    Both A & B
 Discuss Question
Answer: Option C. -> No change
Question 18. Which of the following is NOT a factor affecting reaction rate?
  1.    temperature
  2.    catalysts
  3.    particle size
  4.    polarity
 Discuss Question
Answer: Option D. -> polarity
Question 19. Decreasing the particle size increases the reaction rate because
  1.    It makes particles move faster
  2.    It increases the likelihood of collisions with the correct geometry
  3.    It decreases the surface area available to react
  4.    It increases the number of collisions
 Discuss Question
Answer: Option D. -> It increases the number of collisions
Question 20. Identify the order from the following rate constant : k =9
  1.    second order
  2.    first order
  3.    zero order
  4.    third order
 Discuss Question
Answer: Option A. -> second order

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