Question

The minimum energy that two molecules should possess so that their collisions result in a chemical reaction is called _______ energy.

Answer 1

1. Threshold energy is defined as the minimum energy that the colliding reactant molecules must possess if their collision results in a chemical reaction.
2. The activation energy is given as: Activation energy $=$Threshold energy $-$Average energy actually possessed by the reactant molecules.
3. Hence, The minimum energy that two molecules should possess so that their collisions result in a chemical reaction is called threshold energy.