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Molal fraction of A vapours above te sol...

Molal fraction of A vapours above te solution in mixture of A and B `["MA"_(5)]"A"_(3)` will be
` ["Given ":"P"_("A")^(@)=100"mm Hg and"" P"_("B")^(@)=200"mm Hg"]`

A

0.4

B

0.8

C

0.25

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
`"y"_("A")=("x"_("A")"P"_("A")^(0))/("x"_("A")("P"_("A")^(0)-"P"_("B")^(0))+"P"_("B")^(0))=(0.4xx100)/(0.4(100-200)+200)=0.25`
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Knowledge Check

  • Mole fraction of vapour of A above solution in mixture of A and B(X_(A) = 0.4) will be (P_(A)^(@) = 100mm, P_(B)^(@) = 200 mm) :

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