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1 mole of liquid A and 9 moles of liquid...

1 mole of liquid A and 9 moles of liquid B are mixed to form a solution. If `"P"_("B")^(@)=400"mm"` of Hg and `"P"_("A")^(@)=20 "mm"` of Hg at a temperature 'T' and normal boiling point of liquid B is 300K then answer the questions that follow.
Given data: `"K"_("b")=2.7"K kg mol"^(-1),` Molar mass of B=100
If 'A' is assumed to be perfectly non volatile then what will be normal boiling point of the solution.

A

300

B

300.3

C

303

D

300.003

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta"T"_("b")="K"_("b")xx"m"`
`=2.7xx(1xx1000)/(9xx100)=27/9=3`
`"T"_("b")" solution"="T"_("b")" solvent"+Delta"T"_("b")`
`=300+3=303`
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