Information: Some hydrogen bonds between methanol molecules are disrupted after adding acetone to methanol.
Select the appropriate option:
1. | At specific compositions, a methanol-acetone mixture will form a minimum boiling azeotrope and show a positive deviation from Raoult’s law. |
2. | At specific compositions, a methanol-acetone mixture will form a maximum boiling azeotrope and show a positive deviation from Raoult’s law. |
3. | At specific compositions, a methanol-acetone mixture will form a minimum boiling azeotrope and show a negative deviation from Raoult’s law. |
4. | At specific compositions, a methanol-acetone mixture will form maximum boiling azeotrope and show a negative deviation from Raoult’s law. |
KH value for Ar(g), CO2 (g), HCHO (g) and CH4(g) are 40.39, 1.67, 1.83 × and 0.413 respectively.
Arrange these gases in the order of their increasing solubility.
1. HCHO < CH4 < CO2 < Ar
2. HCHO < CO2 < CH4 < Ar
3. Ar < CO2 < CH4 < HCHO
4. Ar < CH4 < CO2 < HCHO
Which of the following factor (s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent?
(i) Nature of solute
(ii) Temperature
(iii) Pressure
a. (i) and (iii) at constant T
b. (i) and (ii) at constant p
c. (ii) and (iii)
d. Only (iii)
Choose the correct option
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, d) |
The strength of intermolecular forces between two benzene molecules is approximately equivalent to that between two toluene molecules.
(a) | ΔHmix= zero |
(b) | ΔVmix = Zero |
(c) | They will form a minimum boiling azeotrope |
(d) | They will not form an ideal solution |
Identify the incorrect statements (from a to d given above) regarding a mixture of benzene and toluene:
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, d) |
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)
Van't Hoff factor (i) is given by the expression:
a.
b.
c.
d.
The correct choice among the given options are:
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, 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 vapour phase?
(a) | Benzene-toluene | (b) | Water-nitric acid |
(c) | Water-ethanol | (d) | n-Hexane-n-heptane |
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, 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