| 1 |
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
|
| 2 |
Repeated extraction using small portions of solvent are more. |
- A. Accurate
- B. efficient
- C. Slow
- D. Rapid
|
| 3 |
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
|
| 4 |
Solvent extraction method is a particularly useful technique for separation when the product to be separated is. |
- A. Non volatile or thermally unstable
- B. Volatile or thermally stable
- C. Non volatile or thermally stable
- D. Volatile or thermally unstable
|
| 5 |
"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
|
| 6 |
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
|
| 7 |
When i<sub>2</sub>present in the aquous layer in the form of I<sup>-1</sup><sub>3</sub>foes to CCI<sub>4</sub>layer, then the change in colour is from |
- A. Purple to brown
- B. Purple to green
- C. Green to brown
- D. Brown to purple
|
| 8 |
Which of the following substances is used as decolorizing agent. |
- A. Silica gel
- B. Animal charcoal
- C. conc. H2SO4
- D. Asbestos
|
| 9 |
To achieve a good separation, the two liquids are gently shaken to increase their area of. |
- A. Miscibility
- B. Separation
- C. contact
- D. Solubility
|
| 10 |
A component having small value of K mostly remains in the. |
- A. Stationary phase
- B. Mobile phase
- C. Chromatographic tank
- D. Solvent
|