D-And F-Block Elements Ques 84
Question: In which of these processes platinum is used as a catalyst
[DCE 2004]
Options:
A) Oxidation of ammonia to form $ HNO_3 $
B) Hardening of oils
C) Production of synthetic rubber
D) Synthesis of methanol
Show Answer
Answer:
Correct Answer: A
Solution:
Platinum acts as catalyst in the oxidation of ammonia to form nitric oxide.
This reaction is used in the Ostwald’s method of nitric acid preparation
$ 4NH_3+5O_2\underset{750{}^\circ C}{\mathop{\xrightarrow{Pt}}},4NO+6H_2O $ $ 2NO+O_2\to 2NO_2 $ $ 4NO_2+O_2+2H_2O\to 4HNO_3 $
