Quiz  /  Catalyst and Catalysis Class 11 MCQ Questions With Answers

  • 1. 
    The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?

  • Red, because the activation energy is larger
  • Blue, because the activation energy is lower
  • both reaction progress at the same rate

  • 2. 
    What happen to the rate of reaction when a catalyst is added to it?

  • Increases
  • Decreases
  • Nothing changes
  • All of above

  • 3. 
    Catalysts may be in the state of ___________.

  • Solid and liquid only
  • Liquid and gases only
  • Solid and gases only
  • Solid, liquid or gases

  • 4. 
    What does catalyst do to a reaction?

  • Slows down the reaction
  • Nothing changes
  • Speeds up the reaction
  • All of above

  • 5. 
    What do you call the energy that is required to start a reaction?

  • Alternative energy
  • Activation energy
  • Atmospheric energy
  • None of these

  • 6. 
    Enzymes in your body probably work best at which of the following temperatures>

  • 25oC
  • 37oC
  • 98oC
  • 100oC

  • 7. 
    What is the name given to a catalyst in the human body?

  • Saliva
  • Lipid
  • Enzyme
  • Catalyst

  • 8. 
    Which of the reaction pathway shows the catalysed reaction?

  • 1
  • 2

  • 9. 
    A ______________ is a substance that increases the rate of a reaction without being used up during the reaction.

  • catalyst
  • reactant
  • product
  • solute

  • 10. 
    The number of active centers are increased by

  • catalyst
  • catalytic poison
  • activators
  • inhibitors
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