In order to react, a molecule, at the time of collision, must possess a certain amount of energy known as:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → threshold energy
NCERT (2026-27 edition):
3.5 Collision Theory of Chemical Reactions – “… The collisions in which molecules collide with sufficient kinetic energy (called threshold energy*) and proper orientation, so as to facilitate breaking of bonds between reacting species and formation of new bonds to form products are called as effective collisions.”
“* Threshold energy = Activation Energy + energy possessed by reacting species.”