Colligative Properties

Q. The colligative properties of a solution depend on

1. Nature of solvent used
2. Number of solute particles present in it
3. Number of moles of solvent only
4. Nature of solute particles present in it

Q. The molal elevation constant for water is $0.56{\text{K kg mol}}^{-1}$. Calculate the boiling point $\left(\text{in}{}^{\circ }\text{C}\right)$ of a solution made by dissolving $6\text{g}$ of urea $\left(N{H}_{2}CON{H}_2\right)$ in $200\text{g}$ of water.

Q.

Which of the following is a colligative property?

1. Viscosity

2. Optical rotation

3. Osmotic pressure

4. Surface tension

Q. We have taken three different dilute aqueous solutions of $0.1\text{M}{C}_6{H}_{12}{O}_6,0.2\text{M}NaCl\text{and}0.1\text{M}CaC{l}_2$ separately then select the correct statement(s) for these solutions.

1. $CaC{l}_2$ solution will have lowest freezing point.
2. Order of osmotic pressure of solutions is $CaC{l}_2>NaCl>C_6{H}_{12}{O}_6$
3. $C_6{H}_{12}{O}_6$ solution will have highest vapour pressure.
4. Order of boiling point of solutions is $NaCl>CaC{l}_2>C_6{H}_{12}{O}_6$

Q. The boiling point of pure water is $100{}^{\circ }$C. Calculate the boiling point of an aqueous solution containing $0.6\text{g}$ of urea (molar mass = $60{\text{g mol}}^{-1}$) in $100\text{g}$ of water. $K_b$ for water is $0.52{\text{K kg mol}}^{-1}$.

1. $100.052{}^{\circ }\text{C}$
2. $200.055{}^{\circ }\text{C}$
3. $373.052{}^{\circ }\text{C}$
4. $273.052{}^{\circ }\text{C}$

Q.

Properties of solution which depend on only number of solute particles but not on nature of solute are called

1. Physico-chemical properties

2. Chemical properties

3. Colligative properties

4. Unique properties

Q.

Solubility of a gas decreases with increase in temperature.

1. True
2. False

Q. The vapour pressure of an aqueous solution is found to be $750\text{torr}$ at certain temperature ${}^{\prime }{T}^{\prime }$. If ${}^{\prime }{T}^{\prime }$ is the temperature at which pure water boils under atmospheric pressure and same solution show elevation in boiling point $\Delta T_b=1.04\text{K}$, find the atmospheric pressure $(K_b=0.52{\text{k kg mol}}^{-1})$

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. Which of the followings is a colligative property

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

Q.

Name two substances whose solubility :
(i)Increases with the rise in temperature.
(ii)remains practically unaffected with the rise in temperature.
(iii)decreases with the rise in temperature.

Q.

Why the freezing point of Urea decreases when we mixed it in water?

Q. difference between diffusion and dissolution

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. Which of the following properties do not depend on the nature of solute particles?

1. Relative lowering of vapour pressure
2. Elevation of boiling point.
3. Depression of freezing point
4. All of the above.

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.

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.

What are the components of a colloidal solution?

Q.

Is fog a colloid or solution?

Q.

The colligative properties of a solution are

1. Proportional to the number of solute particles present

2. Proportional to normality of solution

3. Proportional to volume of solution

4. Proportional to percentage of solute

Q. Osmotic pressure of colloidal solution is lower than true solution of same concentration. Why?

Q. A $5$ percent aqueous solution by mass of a nonvolatile solute boils at ${100.13}^{\circ }\text{C}$. Calculate the molar mass of the solute.
(Given : $K_b=0.52{\text{K kg mol}}^{-1}$)

1. $200.5{\text{g mol}}^{-1}$
2. $210.5{\text{g mol}}^{-1}$
3. $100.25{\text{g mol}}^{-1}$
4. $105.25{\text{g mol}}^{-1}$

Q. A non-volatile solute ${}^{\prime }{X}^{\prime }$ completely dimerises in water if the temperature is below $-3.72{}^{\circ }C$ and the solute completely dissociates as $X\to Y+Z$, if the temparature is above ${100.26}^{\circ }C$. In between these temperature (including both temperature), ${}^{\prime }{X}^{\prime }$ is neither dissociated nor associated. One mole of ${}^{\prime }{X}^{\prime }$ dissolved in $1\text{kg}$ water.
Given : $K_b\text{of water}=0.52{\text{K. kg mol}}^{-1}$
$K_f\text{of water}=1.86{\text{K.kg mol}}^{-1}$
Which of the following statement (s) is/are true regarding the solution ?

1. The freezing point of the solution is $-{1.86}^{\circ }C$
2. The boiling point of the solution is ${101.04}^{\circ }C$
3. When the solution is cooled to $-{7.44}^{\circ }C,75\%$ of water present initially will separate as ice
4. When the solution is heated to $102.086^{\circ }C,50$% of water present initially will escape out as vapour

Q. Among the following, the incorrect statement about colloids is:

1. They can scatter light
2. They are larger than solute molecules in solution and have high molar mass
3. The osmotic pressure of a colloidal solution is of higher order than the true solution at the same concentration
4. The range of diameters of colloidal particles is between $1$ and $1000\text{nm}$

Q.

Is Milk A Colloid?

Q. The colligative property of a solution depends on

1. the total number of solute particles relative to solvent/solution
2. the size of the particle
3. the shape and charge of the particle
4. none of the above

Q.

An example of a colloid is___________

Q. 46. How much ice will separate if a solution containing 25 gms of ethylene glycol in 100 gms of H2O freezing point of solution = -10 degree k.f for H2O = 1.86

Q. Which of the following solution has higher freezing point?0.05 M A2 (S04)3, 0.1 M K3 \lbrack Fe(CN)6\rbrack. Justify.

Q. an aqueous sugar solution is heated to dryness