P-Block Elements Ques 263

Question: In the catalytic oxidation of ammonia an oxide is formed which is used in the preparation of $ HNO_3 $ . This oxide is

[CPMT 1984; KCET 1990; AIIMS 1996]

Options:

A) $ N_2O_5 $

B) $ N_2O_4 $

C) $ NO_2 $

D) $ NO $

Show Answer

Answer:

Correct Answer: D

Solution:

$ 4NH_3+5O_2\underset{1100K}{\mathop{\xrightarrow{Pt}}}4NO+6H_2O $

NO is used in the preparation of $ HNO_3 $

$ 2NO+O_2\to 2NO_2 $ ; $ 4NO_2+2H_2O+O_2\to 4HNO_3 $



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