Chemical KineticsmediumMCQ SINGLE⭐ Must-Do

A student plots the inverse of the reactant concentration, , on the y-axis against time on the x-axiChemical Kinetics Chemistry Question

Question

A student plots the inverse of the reactant concentration, $\frac{1}{[A]}$, on the y-axis against time $t$ on the x-axis, producing a perfect straight line with a positive slope. What is the kinetic order of this reaction?

Answer: C

💡 Solution & Explanation

The integrated rate equation for a second-order reaction (with identical reactants) is $\frac{1}{[A]_t} = \frac{1}{[A]_0} + kt$. This matches the $y = mx + c$ linear format, where the plot of $1/[A]_t$ vs $t$ yields a straight line with a positive slope equal to $k$.

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