BHU PMT BHU PMT Solved Paper-2004

  • question_answer
    If equilibrium constants of reaction, \[{{N}_{2}}+{{O}_{2}}2NO\]is\[{{K}_{1}},\]and \[\frac{1}{2}{{N}_{2}}+\frac{1}{2}{{O}_{2}}NO\]is\[{{K}_{2}},\]then:

    A)  \[{{K}_{1}}={{K}_{2}}\]                 

    B)  \[{{K}_{2}}=\sqrt{{{K}_{1}}}\]

    C)  \[{{K}_{1}}=2{{K}_{2}}\]              

    D)  \[{{K}_{1}}=\frac{1}{2}{{K}_{2}}\]

    Correct Answer: B

    Solution :

                     \[N+{{O}_{2}}2NO\]                                       ...(1) For Eq. (1) \[{{K}_{1}}=\frac{{{[NO]}^{2}}}{[{{N}_{2}}][{{O}_{2}}]}\]                          ?. (2) \[\frac{1}{2}{{N}_{2}}+\frac{1}{2}{{O}_{2}}NO\]         ...(3) For Eq. (3) \[{{K}_{2}}=\frac{[NO]}{{{[{{N}_{2}}]}^{1/2}}{{[{{O}_{2}}]}^{1/2}}}\]       ?.(4) Dividing Eqs. (2) and (4) \[{{K}_{2}}={{({{K}_{1}})}^{1/2}}=\sqrt{{{K}_{1}}}\]


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