Question

# The following diagram represents the industrial preparation of nitric acid from ammonia $N{H_3} + {O_2}$ (from excess of air).$\mathop {N{H_3} + {O_2}}\limits_{(excess{\text{ }}air)} \xrightarrow[{(900^\circ C)}]{{(A)}}NO\xrightarrow[{Air}]{{(B)}}(C)\xrightarrow[{water}]{}HN{O_3} + NO$Which of the following options correctly describes the reagents, products and reaction conditions?A.A – Catalyst and high pressure, B – Cool, C – $N{O_2}$B.A – Catalyst, B – Cool, C – $N{O_2}$C.A – Catalyst and high pressure, B – high pressure, C – $N{O_2}$D.A –high pressure, B – Catalyst, C – ${N_2}{O_3}$

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Hint:
The Industrial preparation of nitric acid from ammonia is known as the Ostwald Process. During the Ostwald process the catalyst used is platinum.

Step 02: the NO formed in the previous step is very hot. To reduce its temperature, it is passed through a heat exchanger and cooled. NO is again transferred to another oxidizing tower where it is cooled further and is oxidized to $N{O_2}$
A – Catalyst and high pressure, B – Cool, C – $N{O_2}$.