MediumChemistryVapour Pressure & RLVP
+4 / -1
Two liquids A and B form an ideal solution. At 300 K the vapour pressure of a solution of 1 mole of A and x moles of B is 550 mm. If the vapour pressures of pure A and B are 400 mm and 600 mm respectively, then x is -
A
1
B
2
C
3
D
4
Explanation
For ideal solution: P = XA PA° + XB PB° 550 = [1/(1+x)]400 + [x/(1+x)]600 550(1+x)=400+600x 150=50x x=3
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