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.

Subtopic:  Purification of Organic Compounds |
 82%
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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
Subtopic:  Purification of Organic Compounds |
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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

Subtopic:  Purification of Organic Compounds |
 86%
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Paper chromatography is an example of-

1. Partition chromatography

2. Thin layer chromatography

3. Column chromatography

4. Adsorption chromatography

Subtopic:  Purification of Organic Compounds |
 72%
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NEET - 2020
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Halogen in an organic compound that can be detected by -

1. Duma's method 2. Carius method
3. Kjedahl's method 4. Chromatography
Subtopic:  Purification of Organic Compounds |
 74%
From NCERT
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The latest technique for isolation, purification and separation of organic compounds is -

1. Crystallisation

2. Distillation

3. Sublimation

4. Chromatography

Subtopic:  Purification of Organic Compounds |
 73%
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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

Subtopic:  Purification of Organic Compounds |
 66%
From NCERT
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During the hearing of a court case, the judge suspected that some changes in the documents had been carried out. He asked the forensic department to check the ink used at two different places. The technique that can give the best results is-

1. Column chromatography 2. Solvent extraction
3. Distillation 4. Thin layer chromatography
Subtopic:  Purification of Organic Compounds |
 66%
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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

Subtopic:  Purification of Organic Compounds |
 68%
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The best method used for the separation of naphthalene and benzoic acid from their mixture is -
1. Sublimation
2. Chromatography
3. Crystallisation
4. Distillation

Subtopic:  Purification of Organic Compounds |
 65%
From NCERT
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