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NEET Sample Paper NEET Sample Test Paper-55

  • question_answer
    For the reaction\[A+B\,\,\rightleftharpoons \,\,2C\]; 2 mole of A and 3 mole of B are allowed to react. If the equilibrium constant is 4 at\[400{}^\circ C\]. What will be moles of C at equilibrium?

    A) 1.2                               

    B) 2.4

    C) 3.6                               

    D) None of these

    Correct Answer: B

    Solution :

    \[\begin{align}   & A\,\,\,\,+\,\,\,\,B\,\,\rightleftharpoons \,\,\,2C \\  & 2\,\,\,\,\,\,\,\,\,\,\,\,3\,\,\,\,\,\,\,\,\,\,\,\,\,0\, \\  & 2\,-\,x\,\,\,\,3-x\,\,\,\,2x \\ \end{align}\] \[{{K}_{c}}=\,\,\frac{{{\left[ C \right]}^{2}}}{\left[ A \right]\left[ B \right]}\] \[4=\frac{4{{x}^{2}}}{(2-x)(3-x)}\] \[4(6-3x-2x+{{x}^{2}})=4{{x}^{2}}\] \[4\left( {{x}^{2}}-5x+6 \right)=4{{x}^{2}}\] \[5x=6\] \[x=1.2\]


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