Q. No.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.
Match the type of mixture of compounds in Column-I with the technique of separation/purification given in Column-II.
| Column-I | Column-II | ||
| A. | Two solids which have different solubilities in a solvent and which do not undergo a reaction when dissolved in it | 1. | Steam distillation |
| B. | Liquid that decomposes at its boiling point | 2. | Fractional distillation |
| C. | Steam volatile liquid | 3. | Crystallisation |
| D. | Two liquids that have boiling points close to each other | 4. | Distillation under reduced pressure |
Codes:
| A | B | C | D | |
| 1. | 3 | 4 | 1 | 2 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 3 | 2 |
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
Paper chromatography is an example of-
1. Partition chromatography
2. Thin layer chromatography
3. Column chromatography
4. Adsorption chromatography
Halogen in an organic compound that can be detected by -
| 1. | Duma's method | 2. | Carius method |
| 3. | Kjeldahl's method | 4. | Chromatography |
The latest technique for isolation, purification and separation of organic compounds is -
| 1. | Crystallisation | 2. | Distillation |
| 3. | Sublimation | 4. | Chromatography |
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
1. Column chromatography
2. Solvent extraction
3. Distillation
4. Thin layer chromatography
The purification method based on the difference in solubilities of the compound and the impurities in a solvent is -
1. Crystallisation
2. Distillation
3. Chromatography
4. Isolation
The best method used for the separation of naphthalene and benzoic acid from their mixture is -
1. Sublimation
2. Chromatography
3. Crystallisation
4. Distillation
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