A) Oxidation of ammonia to form \[HN{{O}_{3}}\]
B) Hardening of oils
C) Production of synthetic rubber
D) Synthesis of methane
Correct Answer: A
Solution :
Platinum acts as catalysts in the oxidation of ammonia to form nitric oxide. This reaction is used in the Ostwalds method of nitric acid preparation. \[4N{{H}_{3}}+5{{O}_{2}}\xrightarrow[{{750}^{o}}C]{Pt}4NO+6{{H}_{2}}O\] \[4NO+{{O}_{2}}\xrightarrow{{}}2N{{O}_{2}}\] \[4N{{O}_{2}}+{{O}_{2}}+2{{H}_{2}}O\xrightarrow{{}}4HN{{O}_{3}}\]
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