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The correct relation to find out the half-life of a first order reaction is
(k = rate constant of reaction, [A]$_0$ = initial concentration of reactant)

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For first-order reactions, half-life is constant and independent of initial concentration.

Updated On: Jun 20, 2026

$ \frac{\ln 2}{k} $
$ \frac{[A]_0}{2k} $
$ \frac{1}{k[A]_0} $
$ \frac{1}{k} $

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The Correct Option is A

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The correct relation to find out the half-life of a first order reaction is (k = rate constant of reaction, [A]\(_0\) = initial concentration of reactant)

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The Correct Option is A

Solution and Explanation

Top Questions on Half life

Questions Asked in AP EAPCET exam

The correct relation to find out the half-life of a first order reaction is
(k = rate constant of reaction, [A]\(_0\) = initial concentration of reactant)