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NEET Sample Paper NEET Sample Test Paper-40

  • question_answer
    Standard electrode potential for\[S{{n}^{4+}}/S{{n}^{2+}}\]couple is +0.15 V and that for the \[C{{r}^{3+}}/Cr\]couple is -0.74 V. These two couples in their standard state are connected to make a cell. The cell potential will be

    A)  +1.83 V

    B)  +1.19 V

    C)  +0.18 V

    D)  +0.89 V

    Correct Answer: D

    Solution :

     \[S{{n}^{4+}}+2e\xrightarrow{{}}S{{n}^{2+}};E_{RP}^{o}=0.15\,V\]\[C{{r}^{3+}}+3e\xrightarrow{{}}Cr;E_{RP}^{o}=-0.74\,V\](Higher\[{{E}_{OP}}\]) \[\therefore \]\[{{E}_{cell}}=E_{P{{O}_{Cr}}}^{o}+E_{R{{P}_{Sn}}}^{o}=0.74+0.15=+0.89\,V\]


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