Nitric acid is prepared in large scale from ammonia and air.
Reactants

2- 2nd step - Oxidation of nitric oxide to nitrogen dioxide.

Reactants
Pure dry ammonia (1 volume) and air (10 volumes)
Reactions
1- 1st step - Catalytic oxidation of ammonia to form nitric oxide


3- 3rd step - Absorption of nitrogen dioxide in water to give nitric acid.
Catalyst
Platinum (for oxidation of
)

Temperature
700o - 800oC
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