| 1 |
Which one of the following substances is used as decolouring agent |
- A. Animal charcol
- B. Concentrated H<sub>2</sub>SO<sub>4</sub>
- C. CaCI<sub>2</sub>
- D. Silica gel
|
| 2 |
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
|
| 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 |
During chromatography strip should be dipped into solvent mixture to a depth of. |
- A. 3-4 mm
- B. 4-5 mm
- C. 5-6 mm
- D. 6-7 mm
|
| 5 |
Which is not used as drying agent in a desiccator. |
- A. Cacl2
- B. NaCl
- C. P2O5
- D. Salica Gel
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| 6 |
The iodine present in water can be separated by which one of the following techniques |
- A. Sublimation
- B. Chromatography
- C. Filtration
- D. Solvent extraction
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| 7 |
Chromatographic technique is very useful for |
- A. Isolation
- B. Purification
- C. separation
- D. All of them
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| 8 |
"The components of which mixture can be separated by filtration". |
- A. NaCl and CaCl2
- B. Calcium carbonate and NaCl
- C. Blue and green inks
- D. Sand and naphthalene
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| 9 |
Safe and reliable method of drying crystals is through. |
- A. Pressing it between folds of filter paper
- B. Drying it in oven
- C. Evaporation of solution
- D. Vacuum desiccator
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| 10 |
Solvent extraction is an equilibrium process and is controlled by. |
- A. Law of mass action
- B. The mount of solvent used
- C. The amount of solute
- D. Distribution law
|