The time for 87.5% completion of the reaction is — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

87.5% completion means 12.5% (or 1/8th) of the reactant remains. This requires exactly 3 half-lives (1/2 → 1/4 → 1/8). Time = 3 × 100 min = 300 min. Therefore, correct answer is B.