Question

Why is reaching activation energy necessary?

Answer 1

ANSWER_☺

Reactants require a minimum amount of energy to start to break a chemical bond. Explanation; -

Activation energy is required to activate atoms or molecules of the reactants to a state that they can undergo chemical transformation to form products

Answer 2

For the reaction to be performed every reactant has to cross the energy barrier for reaction taking place. which is also called activation energy.