MHT CET 2024 Chemistry question

What is half life of a first order reaction if time required to decreases concentration of reactant from 0.8 M to 0.2 M is 12 hour?

Answer: (C)

Solution

For a first-order reaction, the concentration halves every half-life. takes two half-lives, so h and h. Verification with the rate law: $k =

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Question ID VK-093229