VMMC VMMC Medical Solved Paper-2006

  • question_answer
    In which of these processes platinum is used as a catalyst?

    A)  Oxidation of ammonia to form \[\text{HN}{{\text{O}}_{\text{3}}}\]

    B)         Hardening of oils

    C)         Production of synthetic rubber

    D)         Synthesis of methanol

    Correct Answer: A

    Solution :

    Platinum acts as catalyst in the oxidation of ammonia to form nitric oxide. This reaction is used in the Ostwalds method of nitric acid preparation. \[4N{{H}_{3}}+5{{O}_{2}}\xrightarrow[\text{750}{{\,}^{\text{o}}}\text{C}]{\text{Pt}}4NO+6{{H}_{2}}O\] \[2NO+{{O}_{2}}\xrightarrow{{}}2N{{O}_{2}}\] \[4N{{O}_{2}}+{{O}_{2}}+2{{H}_{2}}O\xrightarrow{{}}45N{{O}_{3}}\]


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