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J & K CET Engineering J and K - CET Engineering Solved Paper-2015

  • question_answer
    For a reaction, \[C(s)+C{{O}_{2}}(g)\xrightarrow{{}}2CO(g);\]the partial pressure of \[C{{O}_{2}}\]and CO are 4 and 8 atm, respectively. \[{{K}_{p}}\]for the reaction is

    A)  0.5     

    B)  2      

    C)  16     

    D)  4

    Correct Answer: C

    Solution :

     \[C(S)+C{{O}_{2}}(g)\xrightarrow[{}]{{}}2CO(g)\] Applying the law of mass action \[{{K}_{p}}=\frac{{{({{p}_{CO}})}^{2}}}{({{p}_{C}})({{p}_{C{{O}_{2}}}})}\] Given, \[{{p}_{CO}}=8\,\text{atm}\] \[{{p}_{C{{O}_{2}}}}=4\,\text{atm}\] and for solid C (S) \[{{p}_{C}}=1\] \[\therefore \] \[{{K}_{p}}=\frac{{{(8)}^{2}}}{1\times 4}\] \[\Rightarrow \] \[{{K}_{p}}=\frac{64}{4}=16\]


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