Question

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

• A. the number of collisions 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 1

Answer: (A), (D)

The correct options are
A the number of collisions among the reactant molecules increases with increasing temperature
D the number of reactant molecules acquiring the activation energy increases with increasing temperature

The increase in the rate constant of a chemical reaction with increasing temperature is due to the fact(s) that :
(A) the number of collisions among the reactant molecules increases with increasing temperature.
Greater is the number of collisions, greater is the rate of the reaction.

(D) the number of reactant molecules acquiring the activation energy increases with increasing temperature.

Greater is the number of molecules with energy equal to or greater than activation energy, greater is the rate of the reaction.