JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Compounds of Transitional Elements

  • question_answer
    In which of these processes platinum is used as a catalyst [DCE 2004]

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

    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 Ostwald?s method of nitric acid preparation \[4N{{H}_{3}}+5{{O}_{2}}\underset{750{}^\circ C}{\mathop{\xrightarrow{Pt}}}\,4NO+6{{H}_{2}}O\] \[2NO+{{O}_{2}}\to 2N{{O}_{2}}\] \[4N{{O}_{2}}+{{O}_{2}}+2{{H}_{2}}O\to 4HN{{O}_{3}}\]


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