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Haryana PMT Haryana PMT Solved Paper-2000

  • question_answer
    EMF of cell, \[Ni|N{{i}^{2+}}(1.0M)||A{{u}^{3+}}(1.0M)|Au\] where \[{{E}^{o}}\] for \[N{{i}^{2+}}|Ni\] is \[-0.25V\]and \[{{E}^{o}}\] for \[A{{u}^{3+}}|Au\]is \[1.50V\]is:

    A)  \[-1.75V\]

    B)  \[+1.25V\]

    C)  \[+\text{ }1.75V\]

    D)  \[+4.0V\]

    Correct Answer: C

    Solution :

    Sol.         \[E_{cell}^{o}={{E}_{RHE}}-{{E}_{LHS}}\] \[=1.50-(-0.25)\] \[=1.50+0.25\] \[=+1.75V\]


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