The correct difference between first- and second-order reaction i… - Vidyadip

MCQ

The correct difference between first- and second-order reaction is that

A
the rate of a first-order reaction does not depend on reactant concentration; the rate of a secondorder reaction does depend on reactant concentrations
✓
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
first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed.
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

✓

Answer

Correct option: 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 $[A]_0$

b
$\left(\mathrm{t}_{1 / 2}\right) 1^{\mathrm{st}}$ order $=$ Independent of Concentration

$\left(\mathrm{t}_{1 / 2}\right) 2^{\mathrm{nd}}$ order $\propto \frac{1}{[\mathrm{A}]_{0}}$

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