The better concentration term when the amount of solute is very small is
Molarity
Molality
Parts per million
Mole fraction
If 0.1 M solution of glucose and 0.1 M solution of urea are placed on two sides of the semipermeable membrane to equal heights, then it will be correct to say that
there will be no net movement across the membrane
Glucose will flow towards urea solution
Urea will flow towards glucose solution
Water will flow from urea solution to glucose
The van't Hoff factor for an aqueous solution of Al2(SO4)3 is
3
5
9
4
Molality is the most inconvenient way of expressing concentration because it
Has no unit
Is very difficult to find out
Involves difficult calculations
Involves the measurement of weight of liquids
In cold countries, ethylene glycol is added to water in the radiators of cars during winter. This results in
Lowering the freezing point
Reducing the specific heat
Reducing the viscosity
Making water a better conductor of electricity
Molarity of liquid HCl, if density of solution is 1.17 g/cc is
36.5
18.25
32.05
42.10
Pure water can be obtained from sea water by
Centrifugation
Plasmolysis
Reverse osmosis
Sedimentation
A solution has 1 : 4 mole ratio of pentane to hexane. The vapour pressure of the pure hydrocarbons at 20oC are 440 mm of Hg for pentane and 120 mm of Hg for hexane. The mole fraction of pentane in the vapour phase would be
0.549
0.200
0.786
0.478
The lowest vapour pressure is exerted by
Water
Mercury
Kerosene
Rectified Spirit
A solution contains non- volatile solute of molecular mass, M2. Which of the following can be used to calculate the molecular mass of solute in terms of osmotic pressure?
