1
AIEEE 2009
MCQ (Single Correct Answer)
+4
-1
Two liquids X and Y form an ideal solution. At 300K, vapour pressure of the solution containing 1 mol of X and 3 mol of Y is 550 mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, vapour pressure of the solution increases by 10 mm Hg. Vapour pressure (in mm Hg) of X and Y in their pure states will be, respectively :
A
200 and 300
B
300 and 400
C
400 and 600
D
500 and 600
2
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
At 80oC, the vapour pressure of pure liquid ‘A’ is 520 mm Hg and that of pure liquid ‘B’ is 1000 mm Hg. If a mixture solution of ‘A’ and ‘B’ boils at 80oC and 1 atm pressure, the amount of ‘A’ in the mixture is (1 atm = 760 mm Hg)
A
52 mol percent
B
34 mol percent
C
48 mol percent
D
50 mol percent
3
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
The vapour pressure of water at 20oC is 17.5 mm Hg. If 18 g of glucose (C6H12O6) is added to 178.2 g of water at 20oC, the vapour pressure of the resulting solution will be
A
17.675 mm Hg
B
15.750 mm Hg
C
16.500 mm Hg
D
17.325 mm Hg
4
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
A 5.25 % solution of a substance is isotonic with a 1.5% solution of urea (molar mass = 60 g mol−1) in the same solvent. If the densities of both the solutions are assumed to be equal to 1.0 g cm−3, molar mass of the substance will be
A
90.0 g mol−1
B
115.0 g mol−1
C
105.0 g mol−1
D
210.0 g mol−1
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