Quiz  /  Catalyst and Catalysis Gate & PSU MCQ Questions With Answers

  • 1. 
    Does the catalyst change the position of equilibrium?

  • Yes
  • No

  • 2. 
    Surface of the catalyst must be

  • smooth
  • evenly spread out
  • cracks and peaks
  • none of the above

  • 3. 
    Which of these reactions are easier to overcome the activation energy barrier?

  • A
  • B

  • 4. 
    How does a catalyst increase the speed of a reaction?

  • By providing alternative pathway with lower Ea
  • By holding the reactants in the right orientation
  • By changing the position of the equilibrium
  • Both A & B

  • 5. 
    In ester hydrolysis, initally, the rate of the reaction is very slow. But after some time the rate increases because of presence of

  • ester
  • water
  • acetic acid
  • HCl

  • 6. 
    In heterogeneous catalysis, reactants and catalysts are in a __________ phase with each other

  • Different
  • Same

  • 7. 
    In homogeneous catalysis, reactants and catalysts are in the ___________ phase with each other.

  • Different
  • Same

  • 8. 
    Which of the following is incorrect for a catalyst?

  • Bio-chemical reactions are mostly catalysed by enzymes
  • Catalyst does not start a reaction
  • Catalyst changes the equilibrium constant of a reaction
  • Co-enzymes increase the activity of an enzyme

  • 9. 
    Catalytic poison in contact process

  • Pt
  • As2O3
  • Fe
  • H2S

  • 10. 
    Which of the following reaction is NOT an example of heterogeneous catalysis?

  • A
  • B
  • C
  • D

  • 11. 
    Which of the following is used as a catalyst in the haber process?

  • V2O5
  • Fe
  • Ag2O
  • SO3

  • 12. 
    The reactants are ___________ onto the surface of the active sites of the catalyst

  • Adsorbed
  • Absorbed
  • Assimilated
  • Dissolved

  • 13. 
    Which one of the following is not an example for heterogenous catalysis?

  • Hydrogenation of oil
  • Manufacture of ammonia by Haber's process
  • Manufacture of sulphuric acid by Contact process
  • Hydrolysis of sucrose in presence of dilute hydrochloric acid

  • 14. 
    A catalyst is __________-specific

  • Radioactive
  • Reactive
  • Reaction
  • None of these

  • 15. 
    Which of these are the best choice of catalysts?

  • Expensive and reusable
  • Cheap and insensitive to impurities
  • Cheap and easily poisoned
  • Cheap and reusable

  • 16. 
    What happens to the molecule of C2H4 and H2 at 4?

  • H2 breaks its bond, bonded on the catalyst surface
  • Double bond of C2H4 is broken, 2 C atoms bond to catalyst
  • H atoms migrate, collide with the bound C species and react

  • 17. 
    What do you require for a successful reaction to occur?

  • Collision of reactant particles
  • Particles have enough energy to overcome Ea
  • High activation energy barrier
  • Both A & B
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