The increase in rate constant of a chemical reaction with increasing temperature is (are) due to the fact (s) that —

Options

A. the number of collision among the reactant molecules increases with increasing temperature.
B. the activation energy of the reaction decreases with increasing temperature.
C. the concentration of the reactant molecules increases with increasing temperature.
D. the number of reactant molecules acquiring the activation energy increases with increasing temperature.

Answer

A, D

Explanation

With increase in temperature , the chances of collision between the reactant molecules increases . As a result , the number of reactant molecule with energy equal to or more than the activation energy increases . This is why reaction-rate as well as rate constant of the reaction increases.