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Question 3
58%

Which statement(s) explain(s) why the rate of a chemical reaction increases when a catalyst is added?

  1. The frequency of collisions between reactant molecules increases.
  2. The catalyst provides an alternative reaction pathway with a lower activation energy.
  3. A greater proportion of molecules have energy greater than or equal to the activation energy.
A

1, 2 and 3

B

Only 1 and 2

C

Only 2 and 3

D

Only 1

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How fast? Questions

  1. A Level
  2. /Chemistry
  3. /How fast?

29 exam-style questions on OCR A A Level Chemistry How fast?. Each one has a worked solution and a mark scheme showing where the marks go.

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