| 1 |
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
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| 2 |
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
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| 3 |
A component having small value of K mostly remains in the. |
- A. Stationary phase
- B. Mobile phase
- C. Chromatographic tank
- D. Solvent
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| 4 |
In chromatographic technique. Rf has unit. |
- A. Mol dm-3
- B. Cm
- C. m3
- D. No units
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| 5 |
Chromatography is the process which involve the distribution of a solute between |
- A. Two mobile phases
- B. A stationary phase and mobile phase
- C. Two stationary and two mobile phases
- D. Two stationary phases
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| 6 |
Chromatography involves the distribution of a solute between. |
- A. Two stationary phases
- B. Two mobile phases
- C. A stationary phase and a mobile phase
- D. Two stationary and two mobile phase.
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| 7 |
Chromatography in which the stationary phase is a solid is classified as. |
- A. Partition chromatography
- B. Gas chromatography
- C. Adsorption Chromatography
- D. Thin layer chromatography
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| 8 |
Which of the following precautions in necessary for smooth filtration |
- A. The filter paper should be of big size
- B. The tip of funnel should not touch the side of the beaker
- C. The stem of the funnel should be very small
- D. The stem of he funnel should remain continuously full of liquid
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| 9 |
Drying agent used in crystallization is. |
- A. P2O3
- B. Animal charcoal
- C. KMnO4
- D. Water
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| 10 |
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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