8. Liquid A decomposes by irreversible first-order kinetics and the half-life period of this reaction is 12 min. The time required for 75% conversion of A is
A. 18 min
B. 24 min
C. 21 min
D. 16 min
8. Liquid A decomposes by irreversible first-order kinetics and the half-life period of this reaction is 12 min. The time required for 75% conversion of A is
A. 18 min
B. 24 min
C. 21 min
D. 16 min