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JEE Main 2012 Chemistry question

ChemistryChemical KineticsJEE Main 2012

For a first order reaction, (A) → products, the concentration of A changes from 0.1 M to 0.025 M in 40 minutes. The rate of reaction when the concentration of A is 0.01 M is :

Answer: (2)

Solution

0.1 → 0.025 M is two half-lives in 40 min, so min and \frac{0.693}{20}$

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Question ID VK-103762