Q.1.
Density of a 2.05M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is [ AIEEE2006]
-
40%
a) 1.14 mol/Kg
-
10%
b) 3.28 mol/Kg
-
50%
c) 2.28 mol /kg
-
0%
d) 0.44 mol/kg
Explanation
Q.2.
During the evaporation of liquid
-
30%
a) The temperature remains unaffected
-
0%
b) May rise or fall depending on the nature
-
50%
c) The temperature of the liquid will fall
-
20%
d) The temperature of the liquid will rise
Q.3.
18g of glucose (C6H12O6) is added to 178.2 g of water. the vapour pressure of water for this aqueous solution at 100°C is [ AIEEE 2006]
-
33%
a) 759.00 torr
-
22%
b) 7.60 torr
-
11%
c) 76.00 torr
-
33%
d) 752.40 torr
Explanation
Q.4.
A mixture of ethyl alcohol and propyl alcohol has vapour pressure of 290 mm at 300K. The vapour pressure of propyl alcohol is 200 nm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure ( in mm) at the same temperature will be [ AIEEE 2007]
-
0%
a) 360
-
43%
b) 350
-
57%
c) 300
-
0%
d) 700
Explanation
Q.5.
Which has minimum osmotic pressure?
-
9%
a) 200 ml of 2M NaCl solution
-
36%
b) 200 ml of 1M glucose solution
-
36%
c) 200 ml of 2M urea solution
-
18%
d) All have same
Q.6.
If 0.5m of Ca(NO3)2 and 0.75m of KOH is taken , then the depression in freezing point is
-
33%
a) Greater in Ca(NO3)2 because number of ions are greater
-
50%
b) Greater in KOH because concentration is high
-
17%
c) Equal in both and freezing point is less than 0°C because ionic concentration is same
-
0%
d) Equal to 0°C in both because ionic concentration is negligible
Q.7.
The osmotic pressure of equimolar solution of urea, BaCl2 and AlCl3 will be in the order
-
0%
a)BaCl2 > Urea > AlCl3
-
22%
b) Urea > BaCl2 > AlCl3
-
22%
c) BaCl2 > AlCl3 > Urea
-
56%
d) AlCl3 > BaCl2 > Urea
Q.8.
Which will form maximum boiling point azeotrope
-
33%
a) HNO3 + H2O solution
-
0%
b) C2H5OH + H2O solution
-
50%
c) C6H6 + C6H5CH3 solution
-
17%
d) None of these
Q.9.
When 20 g of naphthoic acid ( C11H5O2) is dissolved in 50 g of benzene ( Kf = 1.72 K Kg mole -1), a freezing point depression of 2K is observed. the van't Hoff factor (i) is
-
40%
a) 0.5
-
20%
b) 1
-
40%
c) 2
-
0%
d) 3
Explanation
Q.10.
A 5.25% solution of a substance is isotonic with a 1.5% solution of urea ( molar mass = 60 g/mol) in the same solvent. If the densities of both the solutions are assumed to be equal to 1.0g/cm3, molar mass of the substance will be [ AIEEE 2007]
-
60%
a) 210.0 g/mol
-
20%
b) 90.0 g/mol
-
0%
c) 115 g/mol
-
20%
d) 105.0 g/mol
Explanation
Q.11.
The freezing point of equimolal aqueous solution will be highest for
-
40%
a) Glucose
-
0%
b) La(NO3)2
-
20%
c) Ca(NO3)2
-
40%
d) C6H5NH3Cl
Q.12.
Which has highest freezing point?
-
43%
a) 1 m K4[Fe(CN)6] solution
-
14%
b) 1 m C6H12O6 solution
-
29%
c) 1 m KCl solution
-
14%
d) 1 m rock salt solution
Q.13.
At 80°, the vapour pressure of pure liquid A is 520mm of Hg and that of pure liquid B is 1000 mm of Hg. If a mixture solution of A and B boils at 80°C and 1atm pressure, the amount of A in the mixture is ( 1 atm = 760 mm of Hg)
-
50%
a) 50 mol percent
-
33%
b) 52 mol percent
-
17%
c) 34 mol percent
-
0%
d) 48 mol percent
Explanation
Q.14.
X is dissolved in water. Maximum boiling point is observed when X is ... ( 0.1 M each)
-
20%
a) CaSO4
-
40%
b) BaCl2
-
0%
c) NaCl
-
40%
d) Urea
Q.15.
During depression in freezing point of a solution the following are in equilibrium [ IIT 2003]
-
57%
a) Liquid solvent, solid solvent
-
14%
b) Liquid solvent, solid solute
-
0%
c) Liquid solute, solid solute
-
29%
d) Liquid solute, solid solvent
Q.16.
Which of the following solution will have the highest boiling point? .. [ CPMT 1991]
-
25%
a) 1% solution of glucose in water
-
25%
b) 1% solution of sucrose in water
-
25%
c) 1% solution of sodium chloride in water
-
25%
d) 1% solution of calcium chloride in water
Q.17.
Two liquids X and Y form an ideal solution. At 300K vapour pressure of the solution containing 1 mol of X and 3mol 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 [ AIEEE 2009]
-
50%
a) 200 and 300
-
25%
b) 300 and 400
-
12%
c) 400 and 600
-
12%
d) 500 and 600
Explanation
Q.18.
The molar freezing point constant for water is 1.86°C/mole. If 342gm of cane sugar ( C12H22O11) is dissolved in 1000g of water, the solution will freeze at
-
20%
a) -3.92°C
-
40%
b) 1.86°C
-
20%
c) -1.86°C
-
20%
d) 2.42°C
Explanation
Q.19.
Vapour pressure of solution of 5g of no-electrolte in 100 g of water at a particular temperature is 2985 N/mThe vapour pressure of pure water is 3000 N/m2, the molecular weight of the solution is [ IIT 1993]
-
0%
a) 90
-
0%
b) 200
-
100%
c)180
-
0%
d)380
Explanation
Q.20.
A 0.6% urea solution is isotonic with
-
29%
a) 0.6% NaCl solution
-
29%
b) 0.6% glucose solution
-
14%
c) 0.1 M KCl solution
-
29%
d) 0.1 M glucose solution
Q.21.
The henry's law constant for the solubility of N2 gas in water at 298K is 1.0×105 atm. The mole fraction of N2 in air is 0.the number of moles of N2 from air dissolved in 10 moles of water at 298K and 5atm pressure is [ IIT 2009]
-
50%
a) 4.0 × 10-4
-
50%
b) 4.0 × 10-5
-
0%
c) 5.0 × 10-4
-
0%
d) 4.0 × 10-6
Explanation
Q.22.
The vapour pressure of a solvant decreased by 10 mm of mercury when non-volatile solute was added to the solvant. the mole fraction of the solute in the solution is 0.What should be the mole fraction of the solvant, if the decrase in the vapour pressure is to be 20mm of mercury
-
80%
a) 0.8
-
20%
b) 0.6
-
0%
c)0.4
-
0%
d)0.2
Explanation
Q.23.
A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following statements is correct regarding the behavior of the solution? [ AIEEE 2009]
-
20%
a)The solution formed is an ideal solution
-
20%
b) The solution is non-ideal, showing +Ve deviation from Raoult's law
-
20%
c)The solution is non-ideal, showing -Ve deviation from Raoult's law
-
40%
d)n-heptane shows +Ve deviation while ethanol shows -Ve deviation from Raoult's law [ AIEEE 2009]
Q.24.
If molecular weight of a compound is increased then sensitivity is decreased in which of the following methods
-
0%
a) Dialysis
-
25%
b) Osmosis
-
25%
c) Viscosity
-
50%
d) Elevation in boiling point
Q.25.
Equimolal solutions in the same solvent have [ AIEEE 2005]
-
11%
a)Same boiling point but different freezing point
-
22%
b) Same freezing point but different boiling point
-
33%
c)Same boiling point and same freezing points
-
33%
d)Different boiling point and different freezing points
Q.26.
The density (in g mL-1) of a 3.60M sulphuric acid solution that is 29% H2SO4 ( molar mass=98 g/mol) by mass will be [ AIEEE 2007]
-
50%
a) 1.45
-
0%
b) 1.64
-
50%
c)1.88
-
0%
d)1.22
Q.27.
Solution A contains 7g/L of MgCl2 and solution B contains 7g/L of NaCl. At room temperature, the osmotic pressure of
-
25%
a) Solution A is greater than B
-
0%
b) Both have same osmotic pressure
-
75%
c)Solution B is greater than A
-
0%
d)Can't determine
Q.28.
60g of urea ( Mol wt=60) was dissolved in 9.9 moles water. If the vapour pressure of pure water is p°, the relative lowering in vapour pressure of the solution is
-
50%
a) 0.87
-
25%
b) 0.09
-
25%
c) 0.99
-
0%
d) 0.10
Explanation
Q.29.
Which of the following compounds corresponds to van't Hoff factor (i) to be equal to 2 for dilute solution? .. [ NCERT 1978]
-
0%
a) K2SO4
-
0%
b) NaHSO4
-
75%
c) sugar
-
25%
d) MgSO4
Q.30.
When a substance is dissolved in a solvent the results in .... [ NCERT 1981]
-
25%
a) an increase in the b.p. of the solution
-
0%
b) decrease in the b.p. of the solvent
-
50%
c) the solution having higher freezing point than the solvent
-
25%
d) the solution having a lower osmotic pressure than the solvent