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AIIMS AIIMS Solved Paper-2008

  • question_answer
    The emf of Daniell cell at 298 K is \[{{[Al{{({{H}_{2}}O)}_{6}}]}^{3+}}\] \[{{[Mg{{({{H}_{2}}O)}_{6}}]}^{2+}}.\] When the concentration of \[{{[Al{{({{H}_{2}}O)}_{6}}]}^{3+}}\] is 1.0 M and that of \[{{[Mg{{({{H}_{2}}O)}_{6}}]}^{2+}}\] is 0.01 M, the emf changed to \[=\frac{Molecular\,weight}{Acidity}\]. What is the relation between \[2N{{H}_{3}}(g)\xrightarrow{{}}{{N}_{2}}(g)+3{{H}_{2}}(g);\] and \[\Delta H>\Delta E\]?

    A)  \[PbC{{l}_{2}}\]               

    B)  \[PbC{{l}_{4}}\]               

    C)         \[PbC{{l}_{4}}\]         

    D)         \[{{N}_{2}}(g)+3{{H}_{2}}(g)\rightleftharpoons 2N{{H}_{3}}(g)\]

    Correct Answer: C

    Solution :

    In case 1st \[{{O}_{2}}\] \[2.24\,d{{m}^{3}}\] \[1.12\,d{{m}^{3}}\] \[4.48d{{m}^{3}}\] \[0.56d{{m}^{3}}\] \[C{{H}_{3}}CHO,\] In case IInd  \[{{(C{{H}_{3}})}_{2}}CO,\] \[NaOH\] \[C{{H}_{3}}CHO,\] \[{{(C{{H}_{3}})}_{2}}CO,\] \[NaCl\] \[{{(C{{H}_{3}})}_{2}}CO,\] Thus  \[{{(C{{H}_{3}})}_{2}}CO,\]


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