When initial concentration of the reactant is doubled, the half-life period of a zero order reaction

1. is halved

2. is tripled

3. is doubled

4. remains unchanged

Doubtly Asked 30 Oct 2026 NEET UG 2018 Practice test neet Save WhatsApp Report

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Answer: 3. is doubled

For a zero-order reaction, \(t_{1/2}=\dfrac{[\mathrm{A}]_0}{2k}\), directly proportional to the initial concentration.

If \([\mathrm{A}]_0\) is doubled, the half-life is also doubled.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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