Question

Rate constant of a reaction can be expressed by Arrhenius equation as, $k=A{e}^{-E/RT}$ . In this reaction, E represents _____________ .

• A. the energy above which all the colliding molecules will react
• B. the energy below which colliding molecules will not react
• C. the total energy of the reacting molecules at a temperature T
• D. the fraction of molecules with energy greater than the activation energy of the reaction

Answer 1

Answer: (B)

the energy below which colliding molecules will not react

In the Arrhenius equation, $k=A{e}^{-E/RT}$, E represents the activation energy. It is the minimum energy that the reacting molecules should possess so that the collision is effective.

The colliding molecules will not react if their energy is lower than the activation energy.

Option B is correct.