Q. No.4 L of 0.02 M aqueous solution of NaCl was diluted by adding 1 L of water. The molarity of the resultant solution is -
1.
0.004 M
2.
0.008 M
3.
0.012 M
4.
0.016 M
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 x 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
The correct choice among the given is -
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)
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