Chemistry - Liquid Solution Question with Solution | TestHub

ChemistryLiquid SolutionRaoult's LawHard2 minPYQ_2016
ChemistryHardsingle choice

Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at25oC. (Given vapour pressure data at25oC, benzene = 12.8 kPa, toluene = 3.85 kPa)NEET 2016 (Phase 1)

Options:

Answer:
A
Solution:

A - benzene, B - Toluene

PT=PAo XA+PBo XB

=12.8×0.5+3.85×0.5

=6.2+1.925

=8.125

Also, mole fraction of benzene in vapour form

YA=PAo XAPT=6.28.121=0.75

And mole fraction of Toluene in vapour form

YB=1-0.75=0.25

Stream:NEETSubject:ChemistryTopic:Liquid SolutionSubtopic:Raoult's Law
⏱ 2mℹ️ Source: PYQ_2016

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