1.

The rate constant for a zero order reaction is `2xx10^(-2) mol L^(-1) sec^(-1)`. If the concentration of the reactant after `25 sec` is `0.5 M`, the initial concentration must have been:A. `0.5 M`B. `1.25 M`C. `12.5 M`D. `1.0 M`

Answer» Correct Answer - d
For zero order reaction, `C_(0)-C_(t)=Kt`
if `C_(t)=0.5 M, t=25` sec, `K=2xx10^(-2)`
then `C_(0)=1.0M`


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