The concentration of a substance undergoing a | vedclass

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Question

(B) As given in the question,the concentration of a substance becomes one-half of its original value,which refers to the half-life period $(t_{1/2})$.

Vedclass · Accepted Answer

$first$ order reaction

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(B) As given in the question,the concentration of a substance becomes one-half of its original value,which refers to the half-life period $(t_{1/2})$.The half-life period is the time required to reduce the initial concentration to half of its value.For a $zero$ order reaction,$t_{1/2} = \frac{[A]_0}{2k}$.For a $first$ order reaction,$t_{1/2} = \frac{0.693}{k}$.For a $second$ order reaction,$t_{1/2} = \frac{1}{k[A]_0}$.For a $third$ order reaction,$t_{1/2} = \frac{1}{2k[A]_0^2}$.Here,$[A]_0$ is the initial concentration.Since the half-life of a $first$ order reaction is independent of the initial concentration,the correct option is $(b)$.

The concentration of a substance undergoing a chemical reaction becomes one-half of its original value after time,regardless of the initial concentration. The reaction is an example of a

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