JEE Main & Advanced Sample Paper JEE Main Sample Paper-11

  • question_answer
    What is the EMF of represented cell at 298 \[Ag|A{{g}^{+}}(aq.0.1M)||{{H}^{+}}(aq.0.1M),{{H}_{2}}\] \[(g,0.1\,\text{bar})\text{Pt}\] Given: \[E_{Ag/A{{g}^{+}}}^{0}=-0.8\text{V}\]

    A)  0.77 V                  

    B)  -0.829 V

    C)  -0.77 V                

    D)  None of these

    Correct Answer: C

    Solution :

     Cell reaction is \[2Ag(s)+2{{H}^{+}}(aq)\to 2A{{g}^{+}}(aq)+{{H}_{2}}(g)\] \[{{E}_{cell}}=-0.80-\frac{0.0591}{2}\log \frac{{{(0.1)}^{2}}\times 0.1}{{{(0.1)}^{2}}}\] \[{{E}_{cell}}=-0.80+0.02955=-0.77\,\text{V}\]


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