| 1 |
During the process of crystallization, the hot saturated solution; |
- A. Is cooled very slowly to get large-sized crystals
- B. Is cooled at a moderated rate to get medium-sized crystals
- C. Is evaporated to get the crystals of the product
- D. Is mixed with an immiscible liquid to get the pure crystals of the produce
|
| 2 |
A component having small value of K mostly remains in the. |
- A. Stationary phase
- B. Mobile phase
- C. Chromatographic tank
- D. Solvent
|
| 3 |
Which one of the following substances is not sublime material. |
- A. Iodine
- B. Benzoic acid
- C. Ammonium chloride
- D. Potash alum
|
| 4 |
A filtration process could be very time consuming if it were not aided by a gentle suction, which is developed. |
- A. If the paper covers the funnel up to its circumference
- B. If the paper has got small sized pores in it
- C. If the stem of the funnel is large so that it dips into the filtrate
- D. If the paper fits tightly
|
| 5 |
The crystallization of a solid substance is done from a hot saturated solution. The solution is |
- A. Evaporated rapidly
- B. Cooled very slowly to get good crystals
- C. Cooled rapidly to get excellent crystals
- D. Mixed with another miscible solvent
|
| 6 |
If fluted fitter paper, rate of filtration increases as compared tot he cone shaped filter paper because. |
- A. It has greater number of holes in it.
- B. It has greater surface are of filtration
- C. Fluted filter paper has greater pore sizes than cone shaped filter paper.
- D. Thickness of paper is more than cone shaped filter paper
|
| 7 |
In solvent extraction, solute can be separated from solution, by shaking the solution with solvent in which the solute is. |
- A. More soluble
- B. Partially soluble
- C. Insoluble
- D. soluble at high temp
|
| 8 |
The comparative rates at which the solutes move in paper chromatography depends on. |
- A. The size of paper used
- B. Their Rt values solutes
- C. Temp of the experiment
- D. Size the chromate grapic tank
|
| 9 |
The iodine present in water can be separated by which one of the following techniques |
- A. Sublimation
- B. Chromatography
- C. Filtration
- D. Solvent extraction
|
| 10 |
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
|