Give the examples of zero order reactions. - Vidyadip

Question

Give the examples of zero order reactions.

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Answer

Zero order reactions are not common. They take place under special conditions. They are heterogeneous catalysed reactions generally involving metals as catalysts.

(1) Decomposition $NH _3$ on $Pt$ surface :
$2 NH _{3( g )} \xrightarrow[\text { Pt }]{1130 K } N _{2( g )}+3 H _{2( g )}$

(2) Decomposition of $N _2 O$ to $N _2$ and $O _2$ on $Pt$ :
$2 N _2 O _{( g )} \xrightarrow{ Pt } 2 N _{2( g )}+ O _{2( g )}$

(3) Decomposition of $PH _3$ on hot tungsten catalyst at high pressure.

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