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AFMC AFMC Solved Paper-2007

  • question_answer
    For reaction,\[2NOCl(g)2NO(g)+C{{l}_{2}}(g),\]\[{{K}_{c}}\]at \[427{{\,}^{o}}C\]is \[3\times {{10}^{-6}}L\,mo{{l}^{-1}}.\] The value of \[{{K}_{p}}\]is nearly

    A) \[7.5\times {{10}^{-5}}\]                              

    B) \[2.5\times {{10}^{-5}}\]

    C) \[2.5\times {{10}^{-4}}\]                              

    D) \[1.72\times {{10}^{-4}}\]

    Correct Answer: D

    Solution :

    \[2NOCl(g)2NO(g)+C{{l}_{2}}(g)\] \[{{K}_{c}}=3\times {{10}^{-6}}L\,mo{{l}^{-1}},\] \[T=427+273=700\,K\] \[{{K}_{P}}={{K}_{c}}{{(RT)}^{\Delta n}}\] \[\Delta n=2-2=0\] \[{{K}_{p}}={{K}_{c}}RT\] \[=3\times {{10}^{-6}}\times 0.0821\times 700\] \[=172.4\times {{10}^{-6}}=1.72\times {{10}^{-4}}\]


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