JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2005

  • question_answer
        Consider the following reactions at\[1100{}^\circ C\] (I) \[2C+{{O}_{2}}\xrightarrow[{}]{{}}2CO,\]\[\Delta G{}^\circ =-460kJmo{{l}^{-1}}\] (II) \[2Zn+{{O}_{2}}\xrightarrow[{}]{{}}2ZnO,\]\[\Delta G{}^\circ =-360kJ\,mo{{l}^{-1}}\] Based on these, select correct alternate:

    A)  zinc can be oxidised by\[CO\]

    B)  zinc oxide can be reduced by carbon

    C)  both are correct

    D)  none is correct

    Correct Answer: B

    Solution :

                    \[ZnO+C\xrightarrow[{}]{{}}Zn+CO,\Delta G{}^\circ =-ve\] Hence, this is spontaneous.


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