Rate for a zero order reaction is `2xx10^(-2) mol L^(-1) s^(-1)` . If the concentration of the reactant after 25s is `0.5M`, the initial concentration must have been

Options

A. 0.5 M
B. 1.25 M
C. 12.5 M
D. 1.0 M

Explanation

For zero order `[A]_t=[A]_0-kt`
`0.5 = [A] -(2xx 10^(-2)xx 25)`
`:. [A]_0= 1.0M`