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MHT CET Chemistry question

ChemistryChemical KineticsMHT CET

A substance ‘A’ decomposes in solution and follows the first order kinetics. Flask I contains 1 M solution of A and flask II contains its 0.6 M solution. After 8 hrs, the concentration of A in flask I becomes 0.25 M, what will be the time for concentration of A in flask II to become 0.3 M?

Answer: (C)

Solution

In flask I, 1 M to 0.25 M is two half-lives, so h; in flask II, 0.6 M to 0.3 M is one half-life, which is independent of concentration for a

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Question ID VK-068974