CMC Medical CMC-Medical Ludhiana Solved Paper-2010

  • question_answer
    In which one of the following gaseous equilibria, \[{{K}_{p}}\] is less than \[{{K}_{c}}\]?

    A)  \[{{N}_{2}}{{O}_{4}}\rightleftharpoons 2N{{O}_{2}}\]   

    B)  \[2S{{O}_{2}}+{{O}_{2}}\rightleftharpoons 2S{{O}_{3}}\]

    C)  \[2HI\rightleftharpoons {{H}_{2}}+{{I}_{2}}\]

    D)  \[{{N}_{2}}+{{O}_{2}}\rightleftharpoons 2NO\]

    Correct Answer: B

    Solution :

                    \[{{K}_{p}}={{K}_{c}}{{(RT)}^{\Delta {{n}_{g}}}}\]\[\Delta {{n}_{g}}=-1\]  (For the reaction,\[2S{{O}_{2}}+{{O}_{2}}\rightleftharpoons 2S{{O}_{3}}\]). Thus, for this reaction, \[{{K}_{p}}\] is less than\[{{K}_{c}}\].


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