- 1(current)
Q. No.The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows
(1) No deviation from Raoult's law
(2) Positive deviation from Raoult's law
(3) Negative deviation from Raoult's law
(4) That the solution is unsaturated
Which of the following mixtures forms the maximum boiling azeotrope?
| 1. | Heptane + Octane | 2. | Water + Nitric acid |
| 3. | Ethanol + Water | 4. | Acetone + Carbon disulphide |
Boiling of dil. HCl acid does not increase its concentration beyond 22.2 per cent because hydrochloric acid:
(1) is very volatile
(2) is extremely soluble in water
(3) forms a constant boiling mixture
(4) forms a saturated solution at this concentration
The azeotropic mixture of water and ethanol boils at 78.15 oC. When this mixture is distilled, it is possible to obtain-
1. Pure H2O
2. Pure C2H5OH
3. Pure H2O as well as pure C2HOH
4. Neither H2O nor C2H5OH in their pure state
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 and b | 2. | b and c |
| 3. | c and d | 4. | a and d |
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) |
Match the following type of intermolecular interactions present in the pair of compounds given:
| (a) | Methanol and Acetone | (i) | Van der Waal’s forces of attraction |
| (b) | Acetonitrile and Acetone | (ii) | Ion-dipole interaction |
| (iii) | Dipole-dipole interaction |
| (a) | (b) | |
| 1. | (iii) | (ii) |
| 2. | (ii) | (ii) |
| 3. | (iii) | (iii) |
| 4. | (iii) | (i) |
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Q. No.
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