AIIMS 2018 Chemistry Order of Reaction Assertion Reason Question
Assertion : If in a zero order reaction, the concentration of the reactant is doubled, the half life period is also doubled.
Reason : For a zero order reaction, the rate of reaction is independent of initial concentration.
Both assertion and reason are correct and reason is the correct explanation of the assertion.
Both assertion and reason are correct but reason is not the correct explanation of the assertion.
Assertion is correct but reason is incorrect.
Assertion is incorrect but reason is correct.
Correct Answer
Detailed Explanation
The assertion is correct because the half-life expression for a zero-order reaction, given by , accurately reflects that the half-life is directly proportional to the initial concentration and inversely proportional to the rate constant . The reason is also correct as it describes the relationship between half-life and concentration in zero-order kinetics, but it does not provide a specific explanation for the assertion, which is why option B is appropriate. Options A and C are incorrect because they misinterpret the relationship between the assertion and reason, while option D fails to recognize the validity of both statements.
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