| 1 |
Which one of the following substances is not sublime material. |
- A. Iodine
- B. Benzoic acid
- C. Ammonium chloride
- D. Potash alum
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| 2 |
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
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| 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
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| 4 |
Drying agent used in crystallization is. |
- A. P2O3
- B. Animal charcoal
- C. KMnO4
- D. Water
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| 5 |
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
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| 6 |
"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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| 7 |
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
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| 8 |
Chromatography in which stationary phase is a solid is called. |
- A. Partition chromatography
- B. Paper chromatography
- C. High pressure liquid chromatography
- D. Adsorption chromatography
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| 9 |
In order to have good crystals of a substance the temperature of the system at the time of preparation of solution should be |
- A. Around 0°C
- B. Around room temperature
- C. Sufficiently more than room temperature
- D. Just above the room temperature
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| 10 |
Compound which undergo sublimation is |
- A. KMnO4
- B. CaCO3
- C. NH4Cl
- D. Na2CO3
|