Colligative Properties

Q. When a small quantity of $FeC{l}_3$ solution is added to the fresh precipitate of $Fe(OH{)}_3$, a colloidal sol is obtained. The process through which this sol is formed is known as

1. exchange of solvent
2. peptization
3. electrophoresis
4. chemical double decomposition

Q.

Solute when dissolved in water:

1. All of the above

2. Increases the vapour pressure of water

3. Decreases the boiling point of water

4. Decreases the freezing point of water

Q. Which of the followings is a colligative property

1. Vapour pressure
2. Freezing point
3. Osmotic pressure
4. Boiling point

Q. Two beakers $\text{A}$ and $\text{B}$ are present in a closed vessel. Beaker $\text{A}$ contains $152.4\text{g}$ aqueous solution of urea, containing $12\text{g}$ of urea. Beaker $\text{B}$ contains $196.2\text{g}$ glucose solution, containing $18\text{g}$ of glucose. If both solutions are allowed to attain equilibrium, then determine wt. % of glucose in its solution at equilibrium.

1. 15.49
2. 6.71
3. 16.94
4. 20

Q. The boiling point of an aqueous urea solution is $101.04{}^{\circ }C$. The density of solution is 1.12 g/mL. Which of the following is/are correct statement(s) regarding this solution?
[Given: For water, $K_b=0.52{\text{K kg mol}}^{-1},K_f=1.86{\text{K kg mol}}^{-1}$]

1. The molarity of solution is 2 M
2. The freezing point of solution is $3.72{}^{\circ }C$
3. If the solution is cooled to $-1.86{}^{\circ }C$, no ice will form
4. At any temperature, the relative lowering of vapour pressure is $\left(\frac{9}{259}\right)$

Q.

Question 35
Colligative properties are observed when .......... .
(a) a non-volatile solid is dissolved in a volatile liquid
(b) a non-volatile liquid is dissolved in another volatile liquid
(c) a gas is dissolved in non-volatile liquid
(d) a volatile liquid is dissolved in another volatile liquid

Q.

Question 08
Colligative properties depend on ............. .
(a) the nature of the solute particles dissolved in solution
(b) the number of solute particles in solution
(c) the physical properties of the solute particles dissolved in solution
(d) the nature of solvent particles

Q. Compared to a true solution, which of the following is true for a colloidal system/dispersion?

1. Colloidal dispersions have significantly fewer particles
2. Colloidal dispersions have significantly more particles
3. Both true solutions and colloidal dispersions have similar number of particles
4. None of the above

Q. Compared to a true solution, which of the following is true for a colloidal system/dispersion?

1. Both true solutions and colloidal dispersions have similar number of particles
2. Colloidal dispersions have significantly fewer particles
3. Colloidal dispersions have significantly more particles
4. None of the above

Q.

1. True
2. False