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Question
The vapour pressure of a moist gas at 100oC is 750 mm and the aqueous tension at the same temperature is 10 mm. The vapour pressure of the dry gas is :
The vapour pressure of a moist gas at 100oC is 750 mm and the aqueous tension at the same temperature is 10 mm. The vapour pressure of the dry gas is :
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Solution
The correct option is C 740 mm
Some gases are collected over water in the laboratory.
During collection, the gas gathers water vapours and becomes moist.
The partial pressure exerted by the water vapours is called the aqueous tension.
Pressure of dry gas = pressure of moist gas - aqueous tension
=750−10=740mm
Therefore, the option is C.
Some gases are collected over water in the laboratory.
During collection, the gas gathers water vapours and becomes moist.
The partial pressure exerted by the water vapours is called the aqueous tension.
Pressure of dry gas = pressure of moist gas - aqueous tension
=750−10=740mm
Therefore, the option is C.
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