Question:
What is the order of a reaction having unit of the rate constant \(\text{mol}\cdot\text{dm}^{-3} \text{s}^{-1}\) ?
What is the order of a reaction having unit of the rate constant \(\text{mol}\cdot\text{dm}^{-3} \text{s}^{-1}\) ?
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Zero order: Unit of \(k\) = Unit of rate.
Updated On: May 4, 2026
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The Correct Option is A
Solution and Explanation
Concept:
Unit of rate constant depends on order of reaction. General relation: \[ \text{Rate} = k[A]^n \]
Step 1: Unit of rate. \[ \text{Rate} = \text{mol dm}^{-3}\text{s}^{-1} \]
Step 2: For zero order reaction. \[ k = \text{rate} \] So unit of \(k\): \[ \text{mol dm}^{-3}\text{s}^{-1} \]
Step 3: Conclusion. \[ \text{Order = 0} \]
Unit of rate constant depends on order of reaction. General relation: \[ \text{Rate} = k[A]^n \]
Step 1: Unit of rate. \[ \text{Rate} = \text{mol dm}^{-3}\text{s}^{-1} \]
Step 2: For zero order reaction. \[ k = \text{rate} \] So unit of \(k\): \[ \text{mol dm}^{-3}\text{s}^{-1} \]
Step 3: Conclusion. \[ \text{Order = 0} \]
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