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CHEMICAL EQUILIBRIUM MCQs

Total Questions : 20 | Page 1 of 2 pages
Question 1. What is the Keq expression for this reaction? 2 NO(g) + O2(g) ⇌ 2 NO2(g)
  1.    Keq = [NO2]2 / [NO]2 [O2]
  2.    Keq = [NO]2 [O2] / [NO2]2
  3.    Keq = [NO]2 [O2] [NO2]2
  4.    Keq = [NO2]2 / [NO]2 + [O2]
 Discuss Question
Answer: Option A. -> Keq = [NO2]2 / [NO]2 [O2]
Question 2. In a
  1.    2.92
  2.    1.12
  3.    2.24
  4.    4.48
 Discuss Question
Answer: Option A. -> 2.92
Question 3. What is the molarity of 3 mole of hydrochloric acid in 3 L of water
  1.    3
  2.    1
  3.    6
  4.    9
 Discuss Question
Answer: Option B. -> 1
Question 4. What is the correct formula of relationship between Kc and Kp?
  1.    Kp=Kc(RT)ΔnKp=Kc\left(RT\right)^{\Delta n}Kp=Kc(RT)Δn
  2.    Kc=Kp(RT)ΔnKc=Kp\left(RT\right)^{\Delta n}Kc=Kp(RT)Δn
  3.    Kp=(RT)ΔnKp=\left(RT\right)^{\Delta n}Kp=(RT)Δn
  4.    Kp×Kc=(RT)ΔnKp\times Kc=\left(RT\right)^{\Delta n}Kp×Kc=(RT)Δn
 Discuss Question
Answer: Option A. -> Kp=Kc(RT)ΔnKp=Kc\left(RT\right)^{\Delta n}Kp=Kc(RT)Δn
Question 5. How do catalysts increase the rate of reaction?
  1.    The frequency of collisions is the increased
  2.    the activation energy is lowered
  3.    the energy of collisions is increased
  4.    Both the frequency and energy of collisions is increased
 Discuss Question
Answer: Option B. -> the activation energy is lowered
Question 6. What will happen to the equilibrium constant if we change the pressure on an equilibrium system?
  1.    Changed
  2.    Unchanged
 Discuss Question
Answer: Option B. -> Unchanged
Question 7. What makes an effective collision?
  1.    When molecules collide.
  2.    When molecules collide with the proper orientation.
  3.    When molecules collide with proper orientation and enough kinetic energy.
  4.    High Temperature.
 Discuss Question
Answer: Option C. -> When molecules collide with proper orientation and enough kinetic energy.
Question 8. Does equilibrium constant have a unit?
  1.    Yes
  2.    No
 Discuss Question
Answer: Option B. -> No
Question 9. What will happen to the chemical composition if a catalyst was added to the equilibrium system?
  1.    Changed
  2.    Unchanged
 Discuss Question
Answer: Option B. -> Unchanged
Question 10. What will happen to the equilibrium composition if we change the pressure on an equilibrium system?
  1.    Changed
  2.    Unchanged
 Discuss Question
Answer: Option A. -> Changed

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