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CMC Medical CMC-Medical VELLORE Solved Paper-2013

  • question_answer
    A gas X at 1 atm is bubbled through a solution containing a mixture of 1\[M\,{{Y}^{-}}\] and 1 \[M\,{{Z}^{-}}\]ions at\[25{}^\circ C\]. If the reduction potential of \[Z>Y>X,\] then

    A)  \[Y\] will oxidise \[Z\] but not \[Z\]

    B)  \[Y\] will oxidise both \[X\] and \[Z\]

    C)  \[Y\] will oxidise \[Z\] but

    D)  \[Y\] will reduce both \[X\] and \[Z\]

    Correct Answer: A

    Solution :

                    Reduction potentials in the order Z > Y > X means that Z can be reduced most easily and X least easily i.e., their oxidising powers are Z > Y > X. Thus, Y will oxidise X but not Z.


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