A substance reacts with initial concentration of a mol `dm^(-3)` accroding to zero order kinetics. The time it takes for the completion of the reaction is : (k = rate constant)

Options

A. `k//a`
B. `a//2k`
C. `a//k`
D. ka

Answer

C

Explanation

c) For zero order reaction
`k=1/t{[A]_(0)-[A]}`
When the reaction is complete, [A]=0
`therefore k=([A]_(0))/t=a/t` or `t=a/k`