Chemical Kinetics: First-order integrated law MCQ

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First-order integrated lawMediumQuestion 720006

Question

For a first-order reaction, [A] = [A]₀e^(−kt). If k = 0.1 s⁻¹, time for [A] to reduce to [A]₀/10 is:

23.03 s

ln([A]₀/[A]) = kt → ln(10) = 0.1t → t = 2.303/0.1 = 23.03 s.