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General Science

CATALYST AND CATALYSIS MCQs

Total Questions : 20

Page 1 of 2 pages
Question 1. How does a catalyst work in speeding up a reaction?
  1.    By lowering the activation energy or reaction
  2.    by giving them more energy
  3.    by making them more available
  4.    All of above
 Discuss Question
Answer is Option A. -> By lowering the activation energy or reaction
Question 2. A catalyst is __________-specific
  1.    Radioactive
  2.    Reactive
  3.    Reaction
  4.    None of these
 Discuss Question
Answer is Option C. -> Reaction
Question 3. Enzymes in your body probably work best at which of the following temperatures>
  1.    25oC
  2.    37oC
  3.    98oC
  4.    100oC
 Discuss Question
Answer is Option B. -> 37oC
Question 4. A ______________ is a substance that increases the rate of a reaction without being used up during the reaction
  1.    catalyst
  2.    reactant
  3.    product
  4.    solute
 Discuss Question
Answer is Option A. -> catalyst
Question 5. Catalysts may be in the state of ___________
  1.    Solid and liquid only
  2.    Liquid and gases only
  3.    Solid and gases only
  4.    Solid, liquid or gases
 Discuss Question
Answer is Option D. -> Solid, liquid or gases
Question 6. What happen to the rate of reaction when a catalyst is added to it?
  1.    Increases
  2.    Decreases
  3.    Nothing changes
  4.    All of above
 Discuss Question
Answer is Option A. -> Increases
Question 7. What do you call the energy that is required to start a reaction?
  1.    Alternative energy
  2.    Activation energy
  3.    Atmospheric energy
  4.    None of these
 Discuss Question
Answer is Option B. -> Activation energy
Question 8. What does catalyst do to a reaction?
  1.    Slows down the reaction
  2.    Nothing changes
  3.    Speeds up the reaction
  4.    All of above
 Discuss Question
Answer is Option C. -> Speeds up the reaction
Question 9. A catalyst changes the mechanism of the reaction
  1.    True
  2.    False
 Discuss Question
Answer is Option A. -> True
Question 10. A catalyst increases the efficiency of collisions between reactants
  1.    true
  2.    false
 Discuss Question
Answer is Option A. -> true
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