The rate constant of a zero order reaction is` 0.2 mol L^(-3) h^(-1)`. If the concentration of the reactant after 30 min is 0.05 mol ` dm^(-3)`, then its initial concentration would be

Options

A. `0.01 "Mol " dm^(-3)`
B. `0.15 "Mol " dm^(-3)`
C. `0.25 "Mol"dm^(-3)`
D. `4.00 "Mol"dm^(-3)`

Answer

B

Explanation

In 30 minutes 0.1 mol `dm^(-3)` react .Remaining concentration is 0.05 mol `dm^(-3)`
therefore , initial is `0.10 +0.05 = 0.15 mol dm^(-3)`