The rate constant of the reaction `A rarr B` is `0.6 xx 10^(-3)` mole per second. If the concentration of `A` is `5 M`, then concentration of `B` after `20` minutes is:

Options

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

Answer

B

Explanation

Lets assume the reaction to be zero order `therefore` rate = k Moles of A reacted = moles of B formed [A] reacted = `0.6 xx 10^(-3) xx 60 xx 20 = 0.72 M`