Drug X becomes ineffective after 50% decomposition. The original concentration of drug in a bottle w — JEE Mains Chemistry Past Papers Chemistry Question

Question

Drug X becomes ineffective after 50% decomposition. The original concentration of drug in a bottle was 16 mg/mL which becomes 4 mg/mL in 12 months. The expiry time of the drug in months is __________. Assume that the decomposition of the drug follows first order kinetics. (A) 6 (B) 3 (C) 2 (D) 12