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Assertion (A): A rule of thumb says reaction rate doubles for every ten degree rise in temperature.
Reason (R): It corresponds to a particular activation energy near room temperature and does not hold generally.

  • A.A is true but R is false
  • B.A is false but R is true
  • C.Both A and R are true, and R is the correct explanation of A
  • D.Both A and R are true, but R is not the correct explanation of A

Answer: C

Both are true and the reason gives the qualification: a reaction with a very low activation energy hardly responds to temperature while one with a very high energy responds far more steeply. The rule is convenient rather than exact.

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