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

  • question_answer
    The emf of the cell \[Pt\,C{{l}_{2}}(g)({{P}_{1}}atm)/C{{l}^{-}}(aq)\]\[(1M)/C{{l}_{2}}(g)({{P}_{2}}atm)Pt\] will be positive when

    A) \[{{P}_{1}}={{P}_{2}}\]                    

    B) \[{{P}_{1}}<{{P}_{2}}\]

    C) \[{{P}_{1}}>{{P}_{2}}\]                    

    D) None of these

    Correct Answer: B

    Solution :

    [b] The cell reaction is \[C{{l}_{2}}\left( g \right)\left( {{P}_{2}}\text{ }atm \right)\xrightarrow{{}}C{{l}_{2}}\left( aq \right)\left( {{P}_{1}}\,atm \right)\] \[{{E}_{cell}}=-\frac{0.0592}{2}\log \frac{{{P}_{1}}}{{{P}_{2}}}=\frac{0.0592}{2}\log \frac{{{P}_{2}}}{{{P}_{1}}}\] \[{{E}_{cell}}\] will be positive when \[{{P}_{2}}>{{P}_{1}}.\]


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