JEE Main 2025 Chemistry 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.
Answer: (4)
Solution
in 12 months means 2 half-lives passed, so months. Drug
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