The most suitable method of separation of 1:1 mixture of ortho and para-nitrophenols is
1. sublimation
2. chromatography
3. crystallisation
4. steam distillation
Paper chromatography is an example of:
1. Partition chromatography
2. Thin layer chromatography
3. Column chromatography
4. Adsorption 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
Which purification method is suitable for a liquid that decomposes upon boiling?
1. Fractional distillation
2. Steam distillation
3. Simple distillation
4. Distillation under reduced pressure
Halogen in an organic compound that can be detected by -
| 1. | Duma's method | 2. | Carius method |
| 3. | Kjeldahl's method | 4. | 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
Given below are two statements:
| Assertion (A): | Components of a mixture of red and blue inks can be separated by distributing the components between stationary and mobile phases in paper chromatography. |
| Reason (R): | The colored components of inks migrate at different rates because paper selectively retains different components according to the difference in their partition between the two phases. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
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. |
© 2025 GoodEd Technologies Pvt. Ltd.