Q. No.The best method used for the separation of naphthalene and benzoic acid from their mixture is:
1. Chromatography
2. Crystallisation
3. Distillation
4. Sublimation
The method that can be used to separate two compounds with different solubilities in a solvent is-
1. Distillation
2. Isolation
3. Fractional crystallization
4. Filtration
If a liquid compound decomposes at or below its boiling point, then the best method for purification is-
1. Distillation under reduced pressure
2. Azeotropic distillation
3. Gas chromatography
4. Sublimation
A liquid compound (X) can be purified by steam distillation only if it is:
1. Steam volatile, immiscible with water.
2. Not steam volatile, miscible with water.
3. Steam volatile, miscible with water.
4. Not steam volatile, immiscible with water.
What is the partial pressure of toluene in the vapour phase during its steam distillation?
| 1. | Equal to the pressure of the barometer. |
| 2. | Less than the pressure of the barometer. |
| 3. | Equal to vapour pressure of toluene in simple distillation. |
| 4. | More than the vapour pressure of toluene in simple distillation. |
| List-I (Mixtures/Sample) |
List-II (Technique used for purification) |
||
| A. | Glycerol from spent lye | (I) | Steam distillation |
| B. | Chloroform + Aniline | (II) | Fractional distillation |
| C. | Fractions of crude oil | (III) | Distillation under reduced pressure |
| D. | Aniline+water | (IV) | Distillation |
Choose the correct answer from the options given below
| Options: | (A) | (B) | (C) | (D) |
| 1. | III | IV | II | I |
| 2. | IV | II | I | III |
| 3. | I | II | III | IV |
| 4. | I | III | II | IV |
| List-I (Mixture) |
List-II (Method of Separation) |
||
| A. | \( \mathrm{CHCl}_3+ \mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2 \) | I. | Distillation under reduced pressure |
| B. | Crude oil in petroleum industry | II. | Steam distillation |
| C. | Glycerol from spent-lye | III. | Fractional distillation |
| D. | Aniline-water | Iv. | Simple distillation |
1. A-III, B-IV, C-I, D-II
2. A-III, B-IV, C-II, D-I
3. A-IV, B-III, C-I, D-II
4. A-IV, B-III, C-II, D-I
1. Column chromatography
2. Solvent extraction
3. Distillation
4. Thin layer chromatography
Paper chromatography is an example of-
1. Partition chromatography
2. Thin layer chromatography
3. Column chromatography
4. Adsorption chromatography
Which principle does paper chromatography operate on?
1. Adsorption
2. Partition
3. Solubility
4. Volatility
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