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CHEMICAL EQUILIBRIUM MCQs

Total Questions : 20 | Page 2 of 2 pages
Question 11. For the reaction
  1.    forward
  2.    reverse
  3.    forward and reverse
  4.    None of these
 Discuss Question
Answer: Option A. -> forward
Question 12. For the reaction
  1.    N2
  2.    H2
  3.    N2 and H2
  4.    NH3
 Discuss Question
Answer: Option D. -> NH3
Question 13. At elevated temperatures ammonium carbonate, NH2COONH4, is in equilibrium with NH3 and CO2 according to the equation;NH2COONH4(s) ↔ 2 NH3(g) + CO2(g)What is the equilibrium expression for this reaction?
  1.    K = 2 [NH3][CO2] [NH2COONH4]
  2.    K = [NH3]2[CO2] [NH2COONH4]
  3.    K = 2 [NH3][CO2]
  4.    K = [NH3]2[CO2]
 Discuss Question
Answer: Option D. -> K = [NH3]2[CO2]
Question 14. For the reaction
  1.    left
  2.    right
  3.    left and right
  4.    neither left nor right
 Discuss Question
Answer: Option B. -> right
Question 15. Such reactions which continue in both directions are called:
  1.    Irreversible reactions
  2.    Reversible reactions
  3.    Non-reactive reactions
  4.    dynamic reactions
 Discuss Question
Answer: Option B. -> Reversible reactions
Question 16. 2SO2(g)+O2(g)⇌2SO3(g)Adding SO2(g) will
  1.    shift equilibrium right
  2.    shift equilibrium left
  3.    increase rate of reaction
  4.    have no change
 Discuss Question
Answer: Option A. -> shift equilibrium right
Question 17. If the system is shifted to the left, it means that
  1.    Q < Kc
  2.    Q > Kc
  3.    Q = Kc
  4.    None of these
 Discuss Question
Answer: Option B. -> Q > Kc
Question 18. What is the molarity of a solution which contains 22
  1.    0.488 M
  2.    7.67 mol
  3.    7.67 M
  4.    0.00767 M
 Discuss Question
Answer: Option C. -> 7.67 M
Question 19. What is the equilibrium-constant expression for CO2(g) + H2(g) ↔ CO(g) + H2O(l)
  1.    Kc= [CO][H2O] / [CO2][H2]  
  2.    Kc= [CO2][H2] / [CO]
  3.    Kc= [CO2][H2] / [CO][H2O]
  4.    Kc= [CO] / [CO2][H2]  
 Discuss Question
Answer: Option D. -> Kc= [CO] / [CO2][H2]  
Question 20. What kind of equilibrium does the reaction below show?H2(g) +I2(g) ↔ 2HI(g)
  1.    Heterogeneous equilibrium, all the reactants and products are in the same physical state.
  2.    Homogeneous equilibrium, all the reactants and products are in the same physical state.
  3.    Heterogeneous equilibrium, the reactants and products are present in more than one physical state
  4.    Homogeneous equilibrium, the reactants and products are present in more than one physical state
 Discuss Question
Answer: Option B. -> Homogeneous equilibrium, all the reactants and products are in the same physical state.

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