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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2011

  • question_answer
    For the equation\[2A+BB{{A}_{2}}\], the equilibrium concentration of \[A,\,\,B,\,\,B{{A}_{2}}\] is 4, 2 and 2 respectively. The value of \[{{K}_{c}}\] will be

    A) \[0.0625\]                           

    B) \[0.625\]

    C) \[6.280\]             

    D)        \[6.250\]

    Correct Answer: A

    Solution :

    \[\underset{4}{\mathop{2A}}\,+\underset{2}{\mathop{B}}\,\underset{2}{\mathop{B{{A}_{2}}}}\,_{Equilibrium\text{ }concentration}^{{}}\]                 \[{{K}_{c}}=\frac{[B{{A}_{2}}]}{{{[A]}^{2}}[B]}\]                 \[=\frac{2}{{{(4)}^{2}}\times 2}=\frac{1}{16}=0.0625\]


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