Question

Collision theory is applicable to:
A.First order reactions
B.Zero order reactions
C.Bimolecular reactions
D.Intramolecular reaction

Answer 1

Hint: The molecule of gas collides with each other to form a product according to collision theory. A Minimum of two molecules are required for any collision to exist.

Complete step by step answer:
The collision theory was given by Arrhenius and Van’t Hoff. According to this theory a chemical reaction takes place due to the collision between the reacting molecules. When two molecules collide with each other, bond bonding and bond formation occurs at the time of collision. Collision theory is applicable to the bimolecular reactions. Firstly, there should be at least two molecules for collision. The higher order collisions in which three or four molecules collide are rare because in these cases the possibility of simultaneous collision of molecules becomes less. Now let us look at each of the options and see why they are incorrect:
First order reactions are those reactions in which the rate of the reaction is directly proportional to the concentration of reactant and zero order reactions are those reactions in which rate of the reaction is independent of the concentration of reaction. They both are just a type of reaction on the basis of order. We cannot specify how many reacting molecules will be there in either of them.
Intramolecular reactions are the type of reactions in which the reaction occurs within a single molecule. No other molecule or reactant is required for the reaction. There are no chances of collision in intramolecular reactions and hence, collision theory is not applicable here.

From the above discussion, we can conclude that the answer is option C.

Note:
Often in chemistry we use wrong words. Whether it’s solid, liquid or gas we generally use collision words for all of them. But actually the collision word is specifically used when two gas molecules collide. When two liquid molecules collide, we call it encounter. When two solids collide we call it solitton.