MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistrySolutionsPrevious Year Questions
The relative lowering of vapour pressure is equal to the ratio between the number of (BVP 2010)
A.solute molecules to the solvent molecules
B.solute molecules to the total molecules in the✓ Correct
C.solvent molecules to the total molecules in the solution
D.solvent molecules to the total number of ions of the
Explanation
According to Raoult's law, relative lowering in vapour pressure is directly proportional to the mole fraction of solute, i.e., o o p p p Where, s s s n molesof solute n N totalnumber of moles Relative lowering of vapour pressure 2 1 2 n solutemolecules n n totalmolecules in thesolution