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MHT CET 2026 Chemistry question

ChemistryChemical KineticsMHT CET 2026

The time required for 90% completion of a certain first order reaction is 1 hour. Calculate the time required for 99.9 % completion of the same reaction.

Answer: (C)

Solution

For a first order reaction . For 90% completion, of , so h. For 99.9% completion, of , i.e. , so $ =

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Question ID VK-098632