1.

Three different gases x, y, z of molecular masses 2, 16 and 64 were enclosed in a vessel at a constant temperature is correct

Answer»

Gas `z` will be at the top of the vessel
Gas `y` will be at the bottom and x will be at the top
Gas `x` will be at the bottom and y will be at the top
Gases will form a homogeneous mixture

Solution :As the VOLUME of the bubble at the SURFACE BECOMES 8 times, PRESSURE at the bottom of the lake is 8 times the pressure at the surface. As pressure on the surface = 1 atm, pressure at the bottom = 8 atm.
Thus, pressure due to the depth of the lake = 7 atm = 70 m of water.


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