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MHT CET Chemistry question

ChemistrySolutionsMHT CET

Which one of the following is the expression of Raoult's law? (p = vapour pressure of pure solvent, p = vapour pressure of the solution, n = number of moles of the solute, N = number of moles of the solvent)

Answer: (A)

Solution

Raoult's law: relative lowering equals the mole fraction of the solute ; (b) has the wrong sign and uses the solvent mole

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Question ID VK-060703