For a first-order reaction, what is the half-life expression?

MCQ

Chemistry

A t1/2 = 0.693/k

B t1/2 = [A]0/2k

C t1/2 = 1/(k[A]0)

D t1/2 = 2.303/k

Explanation

For first-order reactions, t1/2 = ln(2)/k = 0.693/k, which is independent of the initial concentration.

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