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JEE CHEMISTRY MCQ: CHEMICAL KINETICS
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Medium
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Application
+4 | -1
The half life of a first order reaction is 2000
years. If the concentration after 8000 years is
0.02 M, then the initial concentration was:
years. If the concentration after 8000 years is
0.02 M, then the initial concentration was:
View answer and explanation
Correct option: C
0.32 M
The correct answer is 0.32 M because after 4 half-lives, the initial concentration is reduced to 0.02 M, so the initial concentration is 0.02 * 24.
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