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

Answer

D

Explanation

In first order `rx ^(n)`
`t _(1//2) = ( 693)/(K)`
Independent of initial `"conc"^(n).`