Solved papers for JEE Main & Advanced JEE Main Paper (Held On 25 April 2013)

done JEE Main Paper (Held On 25 April 2013)

  • question_answer1)                 Given that :                 (i) \[{{\Delta }_{f}}{{H}^{0}}\]of\[{{N}_{2}}O\] is \[82\operatorname{k}\operatorname{j}\]\[\operatorname{mo}{{\operatorname{l}}^{-1}}\]                 (ii)  Bond energies of N\[\equiv \]N, N=N, O=O and N=O are 946,418,498 and 607 Kj\[{{\operatorname{mol}}^{-1}}\] respectively.                 The resonance energy of \[{{N}_{2}}\] O is     JEE Main Online Paper ( Held On 25  April 2013 )

    A)                 -88 Kj    

    B)                                        -66 Kj

    C)                                        -62 Kj                    

    D)                                        -44 Kj

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  • question_answer2)                 The Gibbs energy for the decomposition of\[A{{l}_{2}}{{O}_{3}}\]at \[{{500}^{0}}C\] is as follows:                 \[\frac{2}{3}A{{l}_{2}}{{O}_{3}}\to 4/3Al+{{O}_{2}},{{\Delta }_{r}}G=+940\,kJ\,mo{{l}^{-1}}\]                 The potential difference needed for the electrolytic reduction of aluminium oxide at\[{{500}^{0}}C\] should be atleast:     JEE Main Online Paper ( Held On 25  April 2013 )

    A)                 4.5 V                     

    B)                                        3.0 V

    C)                                        5.0 V                     

    D)                                        2.5 V

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JEE Main Online Paper (Held On 25 April 2013)
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