When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is

Options

A. more than zero but less than first
B. zero
C. first
D. second

Answer

C

Explanation

In general, half-life of a reaction is related to the initial concentration of the reactant as follows:
`t_(1//2)prop(1)/(a^(n-1))`
where `n` is the total order of reaction. It can be seen that only for a first order reaction `(n=1)` , half-life period is constant, i.e., it is independent of initial concentration of the reacting species.