First slide

Types of chemical reactions

Question

$2 N H_{3 (g)} \to_{Pt}^{1130 K, HighP} N_{2 (g)} + 3 H_{2 (g)}$ This reaction is an example of

Easy

A

Zero order reaction
B

First order reaction
C

Second order reaction
D

Third order reaction

Solution

At high pressure metal surface is saturated with gas molecules.
So further change in reaction conditions is unable to alter the amount of ammonia on the surface of catalyst;
$∴$ rate is independent of concentration changes of ${NH}_{3}$ ;
It is a zero order reaction

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