(A)a high activation energy usually implies a fast reaction.
(B)rate constant increases with increase in temperature. This is due to a greater number of collisions whose energy exceeds the activation energy.Correct
(C)higher the magnitude of activation energy, stronger is the temperature dependence of the rate constant.Correct
(D)the pre-exponential factor is a measure of the rate at which collisions occur, irrespective of their energy.Correct
Answer: (B),(C),(D)
Solution
. (A) A large makes small, so the reaction is slow: false. (B) Raising increases the fraction of collisions with energy above , so increases: true. (C) ${d
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