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NEET Chemistry Electrochemistry / विद्युत् रसायन Question Bank Self Evaluation Test - Electrochemistry

  • question_answer
    The \[E{{{}^\circ }_{{{M}^{3+}}/{{M}^{2+}}}}\] values for \[Cr,Mn,Fe\] and Co are \[-0.41,+1.57,+0.77\]  and + 1.97V respectively For which one of these metals the change in oxidation state from +2 to +3 is easiest?

    A) Fe                    

    B) Mn  

    C) Cr                                

    D) Co

    Correct Answer: C

    Solution :

    [c] The given values show that Cr has highest negative value of \[E_{{{M}^{3+}}/{{M}^{2+}}}^{\circ }\] i.e., Cr is the strongest reducing agent among given metals therefore its oxidation will be easiest.


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