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NEET Sample Paper NEET Sample Test Paper-70

  • question_answer
    Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts?

    A) Ag                               

    B) Mg

    C) Cu                              

    D) Cr

    Correct Answer: B

    Solution :

    The reduction potential of Mg is less than that of water\[(E{}^\circ  =-\,0.83 V)\]. Hence their ions in the aqueous solution cannot be reduced and instead water will be reduced. \[2{{H}_{2}}O\,\,+\,\,2{{e}^{-}}\,\to \,\,{{H}_{2}}\,\,+\,\,2O{{H}^{-}}\]


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