MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistrySolutionsRelative lowering of vapour pressure
If at certain temperature, the vapour pressure of pure water is 25 mm Hg and that of a very dilute aqueous urea solution is 24.5 mm Hg, the molality of the solution is
A.0.02
B.1.2
C.1.11✓ Correct
D.0.08
Explanation
According to the formula- 1000 x A S A P P molality molar mass of solvent P 25 24.5 18 25 1000 1.11 molality molality M x
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