Q.1 (i) Integrated rate law equation for a zero order reaction is – A. Kt = [A]₀ - [A]_t B. Kt = 2.303log₁₀[A]₀/[A]_t C. K = ([A]_t - [A]₀)/t D. Kt = 2.303log₁₀[A]_t/[A]₀

Answer: (a) Kt = [A]₀ - [A]_t For a zero order reaction the rate is independent of concentration: -d[A]/dt = k. Integrating from [A]₀ at t = 0 to [A]_t at time t gives [A]₀ - [A]_t = kt. Option (b) is the first order equation; (c) has the sign reversed and (d) is wrong for any order.

Chapter: Chemical Kinetics· Chemistry

Integrated rate law equation for a zero order reaction is –

Q.1 (i) Integrated rate law equation for a zero order reaction is –

A. \(Kt = [A]_0 - [A]_t\)

B. \(Kt = 2.303\log_{10}\dfrac{[A]_0}{[A]_t}\)

C. \(K = \dfrac{[A]_t - [A]_0}{t}\)

D. \(Kt = 2.303\log_{10}\dfrac{[A]_t}{[A]_0}\)

Doubtly Asked 29 Oct 2026 Board exam · July 2024 hsc 12th Save WhatsApp Report

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Answer: (a) \(Kt = [A]_0 - [A]_t\)

For a zero order reaction the rate is independent of concentration: \(-\dfrac{d[A]}{dt} = k\). Integrating from \([A]_0\) at \(t = 0\) to \([A]_t\) at time \(t\) gives \([A]_0 - [A]_t = kt\). Option (b) is the first order equation; (c) has the sign reversed and (d) is wrong for any order.

Doubtly AI · 29 Oct 2026 AI-verified · Nov 2026 Report

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Integrated rate law equation for a zero order reaction is –

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