NEET Chemistry Order of Reaction Assertion Reason Question
Assertion (A): The half-life of a first-order reaction is independent of the initial concentration of the reactant.
Reason (R): For a first-order reaction, the logarithm of the concentration of the reactant decreases linearly with time.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Correct Answer
Detailed Explanation
The half-life of a first-order reaction is constant and does not depend on initial concentration, as shown by equation 3.17. The linear decrease of ln[R] with time explains this constancy.
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