The reaction A `to`B follows first order reaction. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 hour. What is the time taken for conversion of 0.9 mole of A to produce 0.675 moles of B?

Options

A. 2 hours
B. 1 hour
C. `0.5` hour
D. `0.25` hour

Answer

B

Explanation

`k=(2.303)/(t)log.(0.8)/(0.6)=2.303log.(4)/(3)`
`t=(2.303)/(k)log.(0.9)/(0.675)=(2.303)/(k)log.(4)/(3)`, `t=1` hour