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What catalyst is used for oxidation of ammonia to produce nitric acid?

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in Chemistry – Class 12 by (188k points)
What catalyst is used for oxidation of ammonia to produce nitric acid?

(a) Palladium hydride

(b) Sodium amalgam

(c) Platinum-Rhodium gauze

(d) Vanadium (V) oxide

I have been asked this question in homework.

The origin of the question is P-Block in section P-Block Elements of Chemistry – Class 12

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Correct option is (c) Platinum-Rhodium gauze

To elaborate: Ammonia is oxidized to nitrogen (II) oxide in the presence of Pt/Rh gauze catalyst at a temperature of 500 K and a pressure of 9 bars. The nitrous oxide is then converted to nitrogen dioxide which is further reacted with water to produce nitric acid. The NO formed is recycled.

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