, , and and a high activation energy usually implies a fast reaction.

, will result in -2 marks, as a wrong option is also darkened. According to the Arrhenius equation, rate constant increases with increase in temperature. This is due to a greater number of collisions whose energy exceeds the activation energy.

and and higher the magnitude of activation energy, stronger is the temperature dependence of the rate constant.

. ONE OR MORE THAN ONE of these four option(s) is(are) correct. • For each question, marks will be awarded in one of the following categories: Full Marks : +4 If only the bubble(s) corresponding to all the correct option(s) is (are) darkened Partial Marks : +1 For darkening a bubble corresponding to each correct option, provided NO incorrect option is darkened. Zero Marks : 0 If none of the bubbles is darkened Negative Marks : -2 In all other cases • For example, if are all the correct options for a question, darkening all these three will result in +4 marks; darkening only will result in +2 marks; and darkening the pre-exponential factor is a measure of the rate at which collisions occur, irrespective of their energy.