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JEE Main & Advanced Sample Paper JEE Main Sample Paper-22

  • question_answer
    The change in potential of ferric to ferrous ion at 298K if ferric ion concentration is reduced ten times white ferrous ion concentration is kept same, will be:

    A)  increased by 0.059 V

    B)  decreased by 0.059 V

    C)  increased by 0.0295 V

    D)  decreased by 0.0295 V

    Correct Answer: B

    Solution :

    \[F{{e}^{+3}}+{{e}^{-}}\xrightarrow{\,}\,F{{e}^{+2}}\]      \[E={{E}^{0}}-\frac{0.059}{1}\log \,\frac{F{{e}^{+2}}}{F{{e}^{+3}}}\]\[{{E}^{0}}-0.059\]


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