A.Molecularity of a reaction is always an integral whole number.
B.A linear plot of [R] versus time gives slope equal to – k for a zero order reaction.
C.The concentration of the reactant decreases linearly with time, for a first order reaction.
D.The half-life of a first order reaction is directly proportional to the rate constant.
E.The minimum amount of energy which the colliding molecules must possess is known as energy of activation.
This reaction follows second order kinetics.
So that, the rate equation for this reaction will
Rate, R = k[X]2 .............(1)
Let initial concentration is x mol L−1,
Plug the value in equation (1)
Rate, R1 = k .(a)2
Given that concentration is increasing by 3 times so new concentration will 3a mol L−1
Plug the value in equation (1) we get
Rate, R2 = k (3a)2
We have already get that R1 = ka2 plus this value we get
R2 = 9 R1
So that, the rate of formation will increase by 9 times.
Rate = k[A]2
If concentration of X is increased to three times,
Rate = k[3A]2
or Rate = 9 k A2
Thus, rate will increase 9 times.