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JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank Electrode potential Ecell Nernst equation and ECS

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    An electrochemical cell is set up as follows                 \[Pt({{H}_{2}},\,1\,atm)/0.1\,M\,HCl\]                 || 0.1 M acetic acid /( \[{{H}_{2}},\,1\,atm\]) Pt                 E.M.F. of this cell will not be zero because [CBSE PMT 1995]

    A)                 The \[pH\] of 0.1 M HCl and 0.1 M  acetic acid is not the same

    B)                 Acids used in two compartments are different

    C)                 E.M.F. of a cell depends on the molarities of acids used

    D)                 The temperature is constant

    Correct Answer: A

    Solution :

                    The pH of 0.1 M \[HCl\]and 0.1 M acetic acid is not the same, because \[HCl\]is a strong acid so its pH is less and \[C{{H}_{3}}COOH\] is a weak acid, so its pH is more.


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