The unit of rate constant is per second, the order of reaction is –

Q.1 (v) The unit of rate constant is per second, the order of reaction is –

A. Zero

B. First

C. Second

D. Third

Doubtly Asked 27 Oct 2026 Board exam · March 2026 hsc 12th Save WhatsApp Report

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Answer: B. First

Answer: (b) First

Units of \(k\) are (mol dm\(^{-3}\))\(^{1-n}\) s\(^{-1}\). For \(n = 1\) this becomes s\(^{-1}\). (Zero order: mol dm\(^{-3}\) s\(^{-1}\); second order: dm\(^3\) mol\(^{-1}\) s\(^{-1}\).)

Doubtly AI · 27 Oct 2026 AI-verified · Oct 2026 Report

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The unit of rate constant is per second, the order of reaction is –

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