| 1 |
Solvent extraction method is particularly useful technique for separation when the product to be separated is |
- A. Non-volatile or thermally unstable
- B. Volatile or thermally unstable
- C. Non-volatile or thermally stable
- D. Volatile or unstable
|
| 2 |
In paper chromatograghy the point at which the solvent rises to maximum extent is called |
- A. Event
- B. Chromatogram
- C. Solvent front
- D. Base line
|
| 3 |
Solvent extraction method is particularly useful technique for separation when the product to be speared is. |
- A. Non volatile or thermally unstable
- B. Volatile or thermally stable
- C. Non volatile or thermally stable
- D. Volatile or thermally unstable
|
| 4 |
Solvent extraction is an equilibrium process and it is controlled by |
- A. Law of mass action
- B. The amount of solvent used
- C. Distribution law
- D. The amount of solute
|
| 5 |
The drying agent used in a desiccator. |
- A. Agcl
- B. NH4Cl
- C. P2O5
- D. AlCl3
|
| 6 |
When hot saturated solution is cooled very rapidly, we get |
- A. Medium sized crystals
- B. large sized crystals
- C. Premature crystallization of the substance
- D. Old crops of crystals
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| 7 |
One of the following substances is not used as a drying reagent in a desiccator |
- A. Cons. H<sub>2</sub>SO<sub>4</sub>
- B. P<sub>2</sub>O<sub>5</sub>
- C. Silica gel
- D. 50% KOH
|
| 8 |
Solvent extraction is an equilibrium process and it is controlled by. |
- A. Law of mass action
- B. The amount of solvent used
- C. Distribution law
- D. The amount of solute
|
| 9 |
Gooch crucible is made of. |
- A. Glass
- B. Paper
- C. Teflon
- D. Procelain
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| 10 |
The comparative rates at which the solutes move in paper chromatography, depends on |
- A. The size of paper used
- B. Their R<sub>f </sub>values
- C. Their partition coefficients
- D. The polarity of solvent used
|