Q. No.The intermolecular forces between benzene molecules are approximately equal in strength to those between toluene molecules. For a benzene + toluene mixture, identify the incorrect statements.
(a)
ΔHmix= Zero
(b)
ΔVmix = Zero
(c)
The mixture forms a minimum-boiling azeotrope
(d)
The mixture does not behave as an ideal solution
Which option lists the incorrect statements?
1.
a and b
2.
b and c
3.
c and d
4.
a and d
Which option lists the incorrect statements?
Relative lowering of vapor pressure is a colligative property because:
| (a) | It depends on the concentration of a non-electrolyte solute in a solution and does not depend on the nature of the solute molecules |
| (b) | It depends on the number of particles of electrolyte solute in a solution and does not depend on the nature of the solute particles |
| (c) | It depends on the concentration of a non-electrolyte solute in solution as well as on the nature of the solute molecules |
| (d) | It depends on the concentration of an electrolyte or non-electrolyte solute in solution as well as on the nature of solute molecules |
The correct choice among the given is:
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
The van't Hoff factor (i) is given by the expression:
(a)
(b)
(c)
(d)
The correct choice among the given options is:
| 1. | a and b | 2. | b and c |
| 3. | c and d | 4. | a and c |
Isotonic solutions must have the same:
| (a) | Solute |
| (b) | Density |
| (c) | Elevation in boiling point |
| (d) | Depression in freezing point |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Which of the following binary mixtures will have the same composition in the liquid and the vapour phase?
| (a) | Benzene-toluene | (b) | Water-nitric acid |
| (c) | Water-ethanol | (d) | n-Hexane-n-heptane |
The correct option is:
| 1. | a and b | 2. | b and c |
| 3. | c and d | 4. | a and d |
The correct choice among the given regarding isotonic solutions is /are:
| (a) | Solute and solvent both are same |
| (b) | Osmotic pressure is same |
| (c) | Solute and solvent may or may not be same |
| (d) | Solute is always same solvent may be different |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
For a binary ideal liquid solution, the curve that represents the variation in total vapor pressure versus composition of the solution is:
| a. |  |
b. |  |
| c. |  |
d. |  |
The correct option is:
1. a and b
2. b and c
3. c and d
4. a and d
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 a non-volatile liquid |
| (d) | A volatile liquid is dissolved in another volatile liquid |
1. a and b
2. b and c
3. c and d
4. a and d
Match the laws/colligative properties given in Column-I with expressions given in Column-II.
| Column-I | Column-II | ||
| A. | Raoult’s law | I. | \(\mathrm{\pi=C R T}\) |
| B. | Osmotic pressure | II. | \(\Delta \mathrm{T}_{\mathrm{f}}=\mathrm{K}_{\mathrm{f}} \mathrm{~m}\) |
| C. | Elevation of boiling point | III. | \(\mathrm{p=x_1 p_1^0+x_2 p_2^0}\) |
| D. | Depression in freezing point | IV. | \(\Delta \mathrm{T}_{\mathrm{b}}=\mathrm{K}_{\mathrm{b}} \mathrm{~m}\) |
Codes:
| A | B | C | D | |
| 1. | I | III | IV | I |
| 2. | I | II | III | IV |
| 3. | I | IV | III | II |
| 4. | III | I | IV | II |
Match the terms given in Column I with expressions given in Column II.
| Column I (Term) | Column II (Expression) |
| A. Mass percentage | 1. \(\text{Number of moles of the solute component} \over \text{Volume of solution in litres}\) |
| B. Volume percentage | 2. \(\text{Number of moles of the solute component} \over \text{Mass of solvent in kilograms}\) |
| C. Molarity | 3. \(\small{\text{Volume of the solute component in solution} \over \text{Total volume of solution}} \times 100\) |
| D. Molality | 4. \(\small{\text{Mass of the solute component in solution} \over \text{Total Mass of solution}} \times 100\) |
Codes:
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 3 | 1 | 2 |
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