A) Mo
B) Fe
C) Mn
D) Pt
Correct Answer: D
Solution :
Key Idea: Write the reaction to find catalyst of Ostwald process. \[4N{{H}_{3}}+S{{O}_{2}}\xrightarrow{Pt}4NO+6{{H}_{2}}O+\] Heat \[2NO+{{O}_{2}}\xrightarrow{{{50}^{o}}C}2N{{O}_{2}}(g)\] \[3N{{O}_{2}}+{{H}_{2}}O\xrightarrow{{}}2HN{{O}_{3}}+NO\] \[\therefore \] Pt is catalyst in Ostwald process.
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