Pathfinder Thermal Physics MCQ 16

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Two rubber balloon filled with the same ideal gas when held at the bottom of a lake in thermal equilibrium with the surrounding water occupy equal volumes. Rubber of the first balloon is a good conductor of heal while that of the second balloon is a good insulator of heat. Both the balloons are set free simultaneously. If temperature of water in the lake is uniform, which balloon will occupy more volume when it comes near surface of the lake ?