State the conditions required for the following reaction to take place, Catalytic oxidation of Ammonia to Nitric oxide .

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Solution

Catalytic oxidation of ammonia:
Ammonia when heated at temperature $800 ° C$ , in the presence of platinum $(Pt)$ catalyst, leads to the formations of Nitric oxide $(NO)$ , and water.
A large amount of heat is liberated during the reaction.
The balanced chemical reaction can be represented as:
$\underset{Ammonia gas}{4 {NH}_{3} (g)} + \underset{Oxygen gas}{5 O_{2} (g)} \overset{Pt, 800 ° C}{\to} \underset{Water}{6 H_{2} O (g)} + \underset{Nitric oxide}{4 NO (g)} + Heat$
Nitric oxide is further oxidized to give brown fumes of Nitrogen dioxide gas.
The balanced chemical reaction can be represented as:
$\underset{Nitric oxide}{2 NO (g)} + \underset{Oxygen}{O_{2} (g)} \to \underset{Nitrogen dioxide}{2 {NO}_{2} (g)}$
Hence, the conditions required are :
Temperature - $800 ° C$
Catalyst Platinum- $(Pt)$

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