Let x moles of CF4 be formed at equilibrium. Hence at equilibrium moles of Co2 = x and that of COF2 = 5 - 2x Hence x2/(5 = 2x)2 = 16 Solving this we get x = 2.22 Hence option 5 Solution Let x moles of CF4 be formed at equilibrium. Hence at equilibrium moles of Co2 = x and that of COF2 = 5 - 2x Hence x2/(5 = 2x)2 = 16 Solving this we get x = 2.22 Hence option 5.