question_answer

For the reaction : \[{{H}_{2(g)}}+C{{O}_{2(g)}}\]  ⇌\[C{{O}_{(g)}}+{{H}_{2}}{{O}_{(g)}}\], if the initial concentration of \[[{{H}_{2}}]=[C{{O}_{2}}]\] and \[x\] moles/litre of hydrogen is consumed at equilibrium, the correct expression of \[{{K}_{p}}\] is   [Orissa JEE  2005]

A)                 \[\frac{{{x}^{2}}}{{{(1-x)}^{2}}}\]             

B)                 \[\frac{{{(1+x)}^{2}}}{{{(1-x)}^{2}}}\]

C)                 \[\frac{{{x}^{2}}}{{{(2+x)}^{2}}}\]            

D)                 \[\frac{{{x}^{2}}}{1-{{x}^{2}}}\]