Chemistry - Chemical Equilibrium Question with Solution | TestHub

Addition of noble gas in chamber (I) causes movable insulated boundary to push down due to which volume of chamber (II) decreases and thereby crowding in chamber II increases. The reaction in chamber (II) will proceed in a direction where crowding is less i.e., forward direction according to Le-Chatelier's principle and thus cooling in chamber (II) is observed. On withdrawing ${\mathrm{NO}}_2$ from chamber (II), volume of chamber (I) increases and crowding decreases due to which the reaction in chamber (I) will proceed in a direction where crowding is more i.e., backward direction according to Le Chatelier's principle and thus cooling in chamber (I) is observed.