In which of the following equilibrium K_c and K_p are not equal?

The dissociation constants for acetic acid and HCN at 25^oC are 1.5 $$ \times $$ 10^$$-$$5 and 4.5 $$ \times $$ 10^$$-$$10 respectively. The equilibrium constant for the equilibrium
CN^$$-$$ + CH₃COOH $$\rightleftharpoons$$ HCN + CH₃COO^$$-$$ would be

The values of for the reactions,

X $$\rightleftharpoons$$ Y + Z      . . . .(i)
A $$\rightleftharpoons$$ 2B       . . . .(ii)

are in the ratio 9 : 1. If degree of dissociation of X and A be equal, then total pressure at equilibrium (i) and (ii) are in the ratio

The value of equilibrium constant of the reaction
HI_(g) $$\rightleftharpoons$$ $${1 \over 2}$$H_2(g) + $${1 \over 2}$$I_2(g)
is 8.0. The The equilibrium constant of the reaction
H_2(g) + I_2(g) $$\rightleftharpoons$$ 2HI_(g) will be