Speed Of Reactions

10 Questions | Total Attempts: 190

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Speed Quizzes & Trivia

This quiz will check your understanding in what you have learnt.


Questions and Answers
  • 1. 
    Which of the following statements about the effect of a catalyst is correct?
    • A. 

      It increases the yield of the product.

    • B. 

      It increases the speed of the reactant particles.

    • C. 

      It increases the activation energy of the reaction.

    • D. 

      It provides an alternative pathway for the reaction to occur.

  • 2. 
    Dilute sulfuric acid reacts with copper(II) oxide to form copper(II) sulfate and water. What would not alter the rate of this reaction?  
    • A. 

      The concentration of the sulfuric acid

    • B. 

      The pressure at which the reaction takes place

    • C. 

      The size of the particles of copper(II) oxide

    • D. 

      The temperature of the reacting mixture

  • 3. 
    Magnesium reacts with hydrochloric acid. Which solution would give the fastest initial rate of reaction?
    • A. 

      40 g of HCl in 1000 cm3 of water.

    • B. 

      20 g of HCl in 1000 cm3 of water.

    • C. 

      15 g of HCl in 500 cm3 of water.

    • D. 

      10 g of HCl in 100 cm3 of water.

  • 4. 
    When an excess of calcium carbonate is added to dilute hydrochloric acid, the reactiongradually becomes slower and finally stops.   Which statement best explains why this happens?
    • A. 

      An insoluble layer of calcium chloride is formed on the calcium carbonate.

    • B. 

      The pieces of calcium carbonate gradually become smaller.

    • C. 

      The calcium carbonate is covered by bubbles of carbon dioxide.

    • D. 

      The concentration of hydrochloric acid gradually reduces to zero.

  • 5. 
    • A. 

      Marble chips and dilute acid at 40 degrees celsius.

    • B. 

      Marble chips and concentrated acid at 20 degrees celsius.

    • C. 

      Marble powder and dilute acid at 20 degrees celsius.

    • D. 

      Marble powder and concentrated acid at 40 degrees celsius.

  • 6. 
    • A. 

      A black solid and a colourless liquid

    • B. 

      A black solid and a blue liquid

    • C. 

      A blue liquid only

    • D. 

      A light blue solid and a colourless liquid

  • 7. 
    • A. 

      The amount of magnesium is decreasing

    • B. 

      The magnesium is acting as a catalyst

    • C. 

      The solution is becoming hotter

    • D. 

      The surface area of the magnesium is increasing

  • 8. 
    Why is nickel used in the hydrogenation of alkenes?
    • A. 

      It increases the yield of the products.

    • B. 

      It makes the reaction more exothermic (heat releasing).

    • C. 

      It lowers the activation energy of the reaction.

    • D. 

      It prevents a reverse reaction from occurring.

  • 9. 
    Which of the following industrial processes does not use a catalyst?
    • A. 

      The synthesis of ammonia

    • B. 

      The fermentation of sugar

    • C. 

      The oxidation of sulfur dioxide

    • D. 

      The electrolysis of sodium chloride

  • 10. 
    A chemical reaction between a solid and an acid is too fast for safe use by a class of students. Which set of changes is most likely to make the reaction safe for the students to use?
    • A. 

      Pieces of solid - larger; acid - less concentrated; temperature - lower

    • B. 

      Pieces of solid - larger; acid - more concentrated; temperature - higher

    • C. 

      Pieces of solid - smaller; acid - less concentrated; temperature - lower

    • D. 

      Pieces of solid - smaller; acid - more concentrated; temperature - higher