As a gas (insoluble in liquid) is bubbled through a liquid, part of the liquid vaporises and these vapours are carried off with the gas. As a sample of dry nitrogen gas is bubbled through a liquid, it

Question

As a gas (insoluble in liquid) is bubbled through a liquid, part of the liquid vaporises and these vapours are carried off with the gas. As a sample of dry nitrogen gas is bubbled through a liquid, it is found that under identical conditions of temperature and pressure, a definite volume of wet nitrogen gas weighs more than the equal volume of dry nitrogen gas. Hence, the liquid through which dry nitrogen gas was passed, may be

Prashant Kotian · Accepted Answer

Correct answer: B,C. The molar mass of dry nitrogen (N₂) is 28 g/mol. Since the wet nitrogen weighs more than an equal volume of dry nitrogen, the average molar mass of the mixture must be greater than 28 g/mol. This implies the vapour added must have a molar mass strictly greater than 28. Water (18) and heavy water (20) are lighter. Benzene (78) and CCl₄ (154) are heavier. Therefore, correct answer is B,C.

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