Two moles of each reactant A and B are taken in a reaction flask. They react in the following manner, A(g) B(g) C(g) D(g) At equilibrium, it was found that the concentration of C is triple to that of B. The equilibrium constant for the reaction is (AIIMS 2009)

A B C D Initial 2 2 0 0 Equilibrium 2 x 2 x x x the value of equilibrium constant is c [C][D] K [A][B] At equilibrium c [C] 3[B] x 3(2 x) x 6 3x x 1.5 [A] [B] 2 x 0.5 [C]=[D] x 1.5 (1.5)(1.5) K 9 (0.5)(0.5) Hence, the correct answer is option (c)