| 1 |
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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| 2 |
Which one of the following methods will be used to separate the mixture of NaCl and sand. |
- A. Chromatography
- B. Solvent extraction
- C. Sublimation
- D. Filtration
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| 3 |
Which one is not example of a sublimate. |
- A. NH4Cl
- B. I
- C. NaCl
- D. Benzoic Acid
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| 4 |
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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| 5 |
The substance used for decolorization of crystalline substance is |
- A. G2O5
- B. Chloroform
- C. Animal charcoal
- D. Soda ash
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| 6 |
Which one of the following is not property of a good solvent. |
- A. It should be inexpensive
- B. It should dissolve impurities easily
- C. It should dissolve large amount of solute at boiling point and less amount of solute at low temperature.
- D. It should not react chemically with solute
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| 7 |
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
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| 8 |
Which one of the following substances is not used as drying agent in desiccators. |
- A. Calcium chloride
- B. Phosphorus pentoxide
- C. Silica gel
- D. 50% NaCl
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| 9 |
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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| 10 |
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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