Quiz  /  Catalyst and Catalysis Class 9 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. 
    A substance that increases the rate of a reaction without being used up during the reaction is called a

  • catalyst
  • product
  • reactant
  • solute

  • 4. 
    The minimum amount of energy needed for colliding particles to react is called the

  • Chemical Energy
  • Kinetic Energy
  • Activation Energy
  • Potential Energy

  • 5. 
    Catalysts may be in the state of ___________.

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

  • 6. 
    Catalysts permit reactions to proceed along a ___________energy path.

  • lower
  • higher

  • 7. 
    What does catalyst do to a reaction?

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

  • 8. 
    What do you call the energy that is required to start a reaction?

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

  • 9. 
    A catalyst

  • is used up
  • is nevr used up

  • 10. 
    Enzymes in your body probably work best at which of the following temperatures>

  • 25oC
  • 37oC
  • 98oC
  • 100oC

  • 11. 
    A catalyst be regenerated or used again and again

  • False
  • True

  • 12. 
    A catalyst increases the efficiency of collisions between reactants.

  • true
  • false

  • 13. 
    A catalyst changes the mechanism of the reaction

  • True
  • False

  • 14. 
    When a catalyst is added to a reaction the rate of reaction,,,

  • Increases
  • Decreases
  • Does not change
  • All of above

  • 15. 
    What is the name given to a catalyst in the human body?

  • Saliva
  • Lipid
  • Enzyme
  • Catalyst

  • 16. 
    Which of the reaction pathway shows the catalysed reaction?

  • 1
  • 2

  • 17. 
    A ______________ is a substance that increases the rate of a reaction without being used up during the reaction.

  • catalyst
  • reactant
  • product
  • solute
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