The rate constant of a first order reaction is `3 xx 10^(-6)` per second. If the initial concentration is `0.10 M`, the initial rate of reaction is

Options

A. `3 xx 10^(-5) Ms^(-1)`
B. `3 xx 10^(-6) Ms^(-1)`
C. `3 xx 10^(-8) Ms^(-1)`
D. `3 xx 10^(-7) Ms^(-1)`

Answer

D

Explanation

Given: Rate constant of the first order reaction `(K) = 3 xx 10^(-6)` per sec and initial concentration `[A] = 0.10 M`. We know that initial rate constant
`K[A] = 3 xx 10^(-6) xx 0.10 = 3 xx 10^(-7) ms^(-1)`.