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MHT CET Chemistry question

ChemistryStates of Matter (Gaseous & Liquid State)MHT CET

To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mole of He and 1.0 mole of an unknown compound (vapour pressure 0.68 atm at 0°C) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at 0°C is close to

Answer: (C)

Solution

The movable piston keeps the total gas pressure at 1 atm; the unknown compound (liquid present) contributes its vapour pressure 0.68 atm, so atm and

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Question ID VK-069626