The rate contant for zero order reaction is `3xx10^(-2) mol^(-1)L.sec^(-1)`. After 25 sec. If the concentraition of reactant is 0.5 M them initial concentraition of the reactant is :-

Options

A. 1 M
B. 1.25 M
C. 0.5 M
D. 0.75 M

Answer

B

Explanation

`A_(0)-A=Kt`
`A_(0)-0.5=3xx10^(-2)xx25`
`A_(0)0.5+0.75=1.25M`