The collision theory states that a reaction is most likely the occur when the reactant particles collide with the proper energy and orientation.
Collision theory is a kind of hypothesis theory which is required to predict the rate of any chemical reaction.
According to this theory only those molecules or reactant will convert into products which collide with each other with a proper orientation of the molecule. And minimum amount of energy is also required by the reactants to form the activated complex which finally convert into the product, this minimum energy is known as the activation energy of the molecule.
Hence, proper energy and proper orientation is required.
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