Reactant 'A' (initial concentration, a) reacts according to zero order kinetics, the time takews for the completion of the reaction is

Options

A. `a//k`
B. `2a//k`
C. `k//2a`
D. `a^(2)//k`

Answer

A

Explanation

Let the reaction be
`Ararr`product
Intial concentration `(t=0)a0`
Concentratiopn at time, `ta-x0`
`K=(x)/(t)`
or `t=x//K`
When reaction is complete, the entire reactant `(A)` is converted into the product, thus, `x=a` .
Hence time taken for the completion of the reaction `(t_(oo))` is
`t_(oo)=(a)/(K)`