Assertion (A): A Chemical reaction becomes faster at higher temperatures. Reason (R): At higher temperatures, molecular motion becomes more rapid. (
- ABoth A and R are individually true and R is the correct explanation of ACorrect
- BBoth A and R are individually true but R is NOT a correct explanation of A
- CA is true but R is false
- DA is false but R is true
Explanation
The correct option is A because both statements are true and the reason directly explains the assertion. According to the kinetic theory of matter, as temperature increases, molecules gain kinetic energy and move more rapidly. This increased molecular motion leads to a higher frequency of collisions between reactant particles. More importantly, a greater fraction of these molecules possess the necessary activation energy to overcome the energy barrier required for a reaction. Consequently, the rate of the chemical reaction increases, making the reaction faster.
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