The reaction A → B follows first order kinetics.
The time taken for 0.80 mole of A to produce 0.60 mole of B is 1 hour. What is the time taken for conversion of 0.90 mole of A to produce 0.675 mole of B?
(1) 1 hour (2) 30 minute (3) 15 minute (4) 5 minute