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 $
