MHT CET 2025 Chemistry question

Chemistry Solutions MHT CET 2025

Calculate the relative lowering of vapour pressure of solution containing 3 g urea in 50 g water. [molar mass of urea = 60 g mol]

(A)0.013
(B)0.025
(C)0.018Correct
(D)0.028

Answer: (C)

Solution

Relative lowering of vapour pressure equals the mole fraction of the solute (Raoult's law): . Moles of urea . Moles of water . $ = =

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Question ID VK-102069