wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The vapour pressure of a solution of the liquids A (P0=80 mm of Hg and XA=0.4) and B (P0=120 mm of Hg and XB=0.6) is observed to be 100 mm of Hg. It shows that the solution exhibits:

A
Positive deviation from ideal behaviour
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Negative deviation from ideal behaviour
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Ideal behaviour
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Positive deviation at low concentrations and negative at higher concentrations
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B Negative deviation from ideal behaviour
From Raoults law,
Ptotal=p0A×XA+p0B×XB
=80.0×0.4+120.0×0.6
=104 mm of Hg
The observed Ptotal is 100 mm of Hg which is less than 104 mm of Hg. Hence the solution shows negative deviation.

flag
Suggest Corrections
thumbs-up
5
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon