JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Kp and Kc Relationship and Characteristics of K

  • question_answer
    In which one of the following gaseous equilibria \[{{K}_{p}}\] is less than \[{{K}_{c}}\]     [EAMCET 1989; MP PET 1994; Pb. PMT 2000; KCET 2001; CBSE PMT 2002]

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

    B)                 \[2HI\]⇌\[{{H}_{2}}+{{I}_{2}}\]

    C)                 \[2S{{O}_{2}}+{{O}_{2}}\]⇌ \[2S{{O}_{3}}\]        

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

    Correct Answer: C

    Solution :

           \[{{K}_{p}}={{K}_{c}}{{(RT)}^{\Delta n}}\]                    \[\Delta n=-1\]for reaction \[2S{{O}_{2}}+{{O}_{2}}\] ⇌ \[2S{{O}_{3}}\]                                 So for this reaction \[{{K}_{p}}\]is less than \[{{K}_{c}}\].


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