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CATALYST AND CATALYSIS MCQs

Total Questions : 20 | Page 2 of 2 pages
Question 11. When a catalyst is added to a reaction the rate of reaction,,,
  1.    Increases
  2.    Decreases
  3.    Does not change
  4.    All of above
 Discuss Question
Answer: Option A. -> Increases
Question 12. A catalyst be regenerated or used again and again
  1.    False
  2.    True
 Discuss Question
Answer: Option B. -> True
Question 13. In ester hydrolysis, initally, the rate of the reaction is very slow
  1.    ester
  2.    water
  3.    acetic acid
  4.    HCl
 Discuss Question
Answer: Option C. -> acetic acid
Question 14. Which one of the following is not an example for heterogenous catalysis?
  1.    Hydrogenation of oil
  2.    Manufacture of ammonia by Haber's process
  3.    Manufacture of sulphuric acid by Contact process
  4.    Hydrolysis of sucrose in presence of dilute hydrochloric acid
 Discuss Question
Answer: Option D. -> Hydrolysis of sucrose in presence of dilute hydrochloric acid
Question 15. Which of the following is used as a catalyst in the haber process?
  1.    V2O5
  2.    Fe
  3.    Ag2O
  4.    SO3
 Discuss Question
Answer: Option B. -> Fe
Question 16. Which of the following is incorrect for a catalyst?
  1.    Bio-chemical reactions are mostly catalysed by enzymes
  2.    Catalyst does not start a reaction
  3.    Catalyst changes the equilibrium constant of a reaction
  4.    Co-enzymes increase the activity of an enzyme
 Discuss Question
Answer: Option C. -> Catalyst changes the equilibrium constant of a reaction
Question 17. What do you require for a successful reaction to occur?
  1.    Collision of reactant particles
  2.    Particles have enough energy to overcome Ea
  3.    High activation energy barrier
  4.    Both A & B
 Discuss Question
Answer: Option D. -> Both A & B
Question 18. Which of these are the best choice of catalysts?
  1.    Expensive and reusable
  2.    Cheap and insensitive to impurities
  3.    Cheap and easily poisoned
  4.    Cheap and reusable
 Discuss Question
Answer: Option D. -> Cheap and reusable
Question 19. The minimum amount of energy needed for colliding particles to react is called the
  1.    Chemical Energy
  2.    Kinetic Energy
  3.    Activation Energy
  4.    Potential Energy
 Discuss Question
Answer: Option C. -> Activation Energy
Question 20. What is the name given to a catalyst in the human body?
  1.    Saliva
  2.    Lipid
  3.    Enzyme
  4.    Catalyst
 Discuss Question
Answer: Option C. -> Enzyme

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