The rate constant of the reaction A `rarr` B is `0.6 xx 10^(-3)` mol `L^(-1)s^(-1)`. If the concentration of A is 5 M, then concentration of B after 20 minutes is

Options

A. 3.60 M
B. 0.36 M
C. 0.72 M
D. 1.08 M

Answer

C

Explanation

Reaction is of zero order as the unit of rate constant is mol `L^(-1)s^(-1)`
`therefore` Concentration of B=`kxt=0.6xx10^(-3)xx20xx60=0.72` M