Question

The effective collisions between the reactant molecules at higher temperatures ___________

(a) Increase

(b) Decrease

(c) Remains same

(d) First increase then decrease

This question was addressed to me in semester exam.

Question is taken from Molecularity of a Reaction in portion Reaction Dynamics of Engineering Chemistry I

Answer 1

The correct answer is (a) Increase

The explanation is: The effective collisions between the reactant molecules at higher temperatures increase. At higher temperature randomness increases and molecules moves with a faster velocity which results in more collision between the reactants.