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Solutions - 13
1.
Process of dissolution occurs due to breakage. and establishment of intermolecular forces of attraction between solute and solvent molecules.
a) False
b) True
2.
Ethylene glycol when mixed with water it lowers the freezing point and raises the boiling point.
a) True
b) False
3.
Presence of volatile solute in solution decreases the vapour pressure of the solvent.
a) False
b) True
4.
To observe the colligative properties of solution following conditions should be fulfilled.
a. Solute should be volatile. b. Solute should be non-electrolyte.
a) False
b) True
5.
Lowering of vapour pressure depends upon the number of solute particles not on their molar mass.
a) False
b) True
6.
Ce
2
(SO
4
)
3
shows exceptional behaviour whose solubility increases with increase in temperature.
a) False
b) True
7.
For the determination of solubility of a substance a saturated solution of a solid is prepared at constant temperature.
a) True
b) False
8.
Liquid mixtures, which distil with a change in composition are called geotropic mixtures.
a) True
b) False
9.
Raoult’s law states, “The lowering of vapour pressure is inversely proportional to the mole fraction of solute”.
a) True
b) False
10.
If solution obeys Raoult’s law they are ideal.
a) True
b) False
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