The equilibrium constant `(K_P)` for the decomposition of gaseous `H_2O, H_2O(g)toH_2(g)+1/2O_2(g)` , is related to degree of dissociation `(prop)` at a total pressure ( P) as-

Options

A. `K_p=(prop^3p^(1//2))/((1+prop)(2+prop)^(1//2))`
B. `K_p=(prop^3p^(3//2))/((1+prop)(2+prop)^(1//2))`
C. `K_p=(prop^3p^(2//2))/((1+prop)(2+prop)^(1//2))`
D. `K_p=(prop^(3//2)p^(1//2))/((1-prop)(2+prop)^(1//2))`

Answer

D