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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2015

  • question_answer
    For the combustion of 1 mole of liquid benzene at 298K, the heat of reaction at constant pressure is \[{{H}_{2}}O\] What would be the heat of combustion of benzene at constant volume?

    A) \[C{{H}_{2}}\]                   

    B) \[{{\text{C}}_{\text{3}}}{{\text{H}}_{\text{4}}}\]

    C) \[{{\text{C}}_{\text{3}}}{{\text{H}}_{\text{3}}}\]             

    D) \[{{\text{C}}_{6}}{{\text{H}}_{8}}\]

    Correct Answer: A

    Solution :

    \[~\text{Xe}\] \[\text{C}{{\text{u}}^{2+}}\text{+4C}{{\text{N}}^{-}}\xrightarrow{{}}{{\text{ }\!\![\!\!\text{ Cu(CN}{{\text{)}}_{4}}\text{ }\!\!]\!\!\text{ }}^{3-}}\text{more stable}\] \[\text{C}{{\text{d}}^{\text{2}+}}\text{+ 4C}{{\text{N}}^{-}}\xrightarrow{{}}{{\left[ \text{Cd}{{\left( \text{CN} \right)}_{\text{4}}} \right]}^{\text{3}-}}\text{less stable}\]          \[\text{C}{{\text{d}}^{+}}\] \[\text{C}{{\text{u}}^{\text{2}+}}\] \[\text{C}{{\text{u}}^{\text{2}+}}\] \[\text{C}{{\text{N}}^{-}}\] \[{{[Ar]}^{18}}3{{d}^{3}}4{{s}^{2}}\] \[\text{4}{{\text{s}}^{\text{2}}}\]


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