The reaction $H_2\left(g\right)+I_2\left(g\right)\rightleftharpoons 2HI\left(g\right)$ is carried out in a 1-liter flask. If the same reaction is carried out in a 2-liter flask at the same temperature, the equilibrium constant will be

We know that equilibrium constant changes only when temperature changes. It is the reaction quotient Q which is lower, equal to or higher than the equilibrium constant according to Le Chatelier's  principle. Alos when the volume increases reaction quotient and equilibrium constant remains unchanged as both sides of the reaction have equal number of moles.

Therefore, the correct answer is option (A) same.