Match the laws given in Column I with expressions given in Column II.
Column I | Column II |
A. Raoult’s law | 1. = CRT |
B. Osmotic pressure | 2. |
C. Elevation of boiling point | 3. |
D. Depression in freezing point | 4. |
Codes
A | B | C | D | |
1. | 2 | 3 | 4 | 1 |
2. | 1 | 2 | 3 | 4 |
3. | 1 | 4 | 3 | 2 |
4. | 3 | 1 | 4 | 2 |
In comparison to a 0.01 M solution of glucose, the depression in the freezing point of a 0.01 M MgCl2 solution will be -
1. | Same | 2. | About twice |
3. | About three times | 4. | About six times |
The unit of Ebullioscopic constant is:
1. K kg mol-1 or K (molality)-1
2. mol kg K-1 or K-1 (molality)
3. kg mol-1 K-1 or K-1 (molality)-1
4. K mol kg-1 or K (molality)
A solution that has the highest boiling point among the following is -
1. 1.0 M NaOH
2. 1.0 M Na2SO4
3. 1.0 M NH4NO3
4. 1.0 M KNO3
Colligative properties depend on:
1. | The nature of the solute particles dissolved in the solution. |
2. | The number of solute particles in the solution. |
3. | The physical properties of the solute particles dissolved in the solution. |
4. | The nature of solvent particles. |
Preservation of fruits against bacterial action by adding sugar is an example of-
1. Exosmosis
2. Reverse-osmosis
3. Diffusion
4. Capillary action
The partial pressure of ethane over a solution containing 6.56 × 10–2 g of ethane is 1 bar. If the solution contains 5.00 × 10–2 g of ethane, the partial pressure of the gas will be -
1. 0.66 bar
2. 0.96 bar
3. 0.76 bar
4. 0.19 bar
The positive deviations from Raoult’s law mean the vapour pressure is:
1. Higher than expected.
2. Lower than expected.
3. As expected.
4. None of the above
The type of inter molecular interactions present in
(a) | n-hexane and n-octane | (i) | Van der Waal’s forces of attraction |
(b) | NaClO4 and water | (ii) | ion-dipole interaction |
(iii) | dipole-dipole interaction |
(a) | (b) | |
1. | (i) | (ii) |
2. | (ii) | (ii) |
3. | (i) | (iii) |
4. | (iii) | (iii) |
The amount of benzoic acid (C6H5COOH) required for preparing 250 mL of 0.15 M solution in methanol is -
1. | 4.57 g | 2. | 3.57 g |
3. | 1.57 g | 4. | 12.57 g |