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NEET Sample Paper NEET Sample Test Paper-78

  • question_answer
    Calculate the value of \[\Delta G\] of a cell reaction \[\operatorname{AgCl}\,\,+\,\,{{e}^{-}} \xrightarrow{{}}\, Ag\,\,+\,\,C{{l}^{\Theta }}\] If standard emf of a cell is 0.220 V

    A)  21.20kJ                       

    B)  -21.20 kJ           

    C)  -2.12 kJ                       

    D)  +2.12 kJ

    Correct Answer: B

    Solution :

    We know that \[\Delta G{}^\circ =-nFE{}^\circ \] \[= -1\times  96500 F\,\,\times \,\,0.220\,\,V\] \[=\,\,-\,21.20\,\,kJ\]


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