The correct difference between first and second order reactions is that:

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1 mark

The correct difference between first and second order reactions is that:

A $A first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed$
B $The half-life of a first-order reaction does not depend on [A]_{0}; the half-life of a second-order reaction does depend on [A]_{0}$
C $The rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations$
D $The rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations$

Solution & Step-by-step Explanation

- For a first-order reaction, t_{1/2} = \frac{0.693}{k} . It is independent of the initial concentration [A]_{0} .For a second-order reaction, t_{1/2} = \frac{1}{k [ A ] _{0}} . It is inversely proportional to the initial concentration.This is a fundamental distinguishing feature.

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The correct difference between first and second order reactions is that:

A first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed

The half-life of a first-order reaction does not depend on [A]_{0}; the half-life of a second-order reaction does depend on [A]_{0}

The rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations

The rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations

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