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NEET AIPMT SOLVED PAPER SCREENING 2007

  • question_answer
                    The equilibrium constant of the reaction:                                                                                                             \[Cu(s)\,+2A{{g}^{+}}(aq)\,\to C{{u}^{2+}}(aq)+2Ag(s);\]                 \[{{E}^{o}}=0.46\,V\] at 298 K is:

    A)                 \[2.4\times {{10}^{10}}\]

    B)                 \[2.0\times {{10}^{10}}\]

    C)                         \[4.0\times {{10}^{10}}\]

    D)                 \[4.0\times {{10}^{15}}\]

    Correct Answer: D

    Solution :

                    \[Cu(s)+2A{{g}^{2+}}(ag)\xrightarrow[{}]{{}}C{{u}^{2+}}(aq)+2Ag(s)\]                 \[{{E}^{o}}=0.46\,V\,at\,298\,K\]                 \[RT\,\ln \,K=nF{{E}^{o}}\]                 \[\ln \,K=\frac{nF{{E}^{o}}}{RT}\]                 \[=\frac{2\times 0.46}{0.0591}\]                 \[K=4\times {{10}^{15}}\]


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