BCECE Medical BCECE Medical Solved Papers-2013

  • question_answer
    Photochemical smog pollution does not contain

    A)  ozone

    B)  nitrogen dioxide

    C)  carbon dioxide

    D)  PAN (Peroxy AcyI Nitrate)

    Correct Answer: C

    Solution :

    Photochemical smog is highly oxidising polluted atmosphere -comprising largely of ozone \[({{O}_{3}})\], oxides of nitrogen \[(N{{O}_{x}})\], hydrogen peroxide \[({{H}_{2}}{{O}_{2}})\], organic peroxides, Peroxy Aceryl Nitrate (PAN) and Peroxy. Benzyl Nitrate (PBN). Some sulphates and nitrates can also be formed in photochemical smog due to oxidation of sulphur containig components \[(S{{O}_{2}},\,{{H}_{2}}S)\] and \[N{{O}_{x}}({{N}_{2}}{{O}_{5}},N{{O}_{2}})\] but it does not contain carbon di-oxide \[(C{{O}_{2}})\]. Photochemcial smog materials causes damage to plants, human health hazards and corrosion problems.


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