SolutionHard
Question
The vapour pressure of pure liquid A is 10 torr and at the same temperature when 1 g of B solid is dissolved in 20 g of A, its vapour pressure is reduced to 9.0 torr. If the molecular mass of A is 200 amu, then the molecular mass of B is :
Options
A.100 amu
B.90 amu
C.75 amu
D.120 amu
Solution
R.L.V.P. : 
= XB
XB =
R.L.V.P. : = XB
XB =
XB =
MB =
= 90.
= XBXB =
R.L.V.P. :
= XBXB =
XB =
MB =
= 90. Create a free account to view solution
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