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Chapter-2 - 11th - Experimental Techniques in Chemistry Preparation Multiple Questions and Answers.
| 41. | Repeated extraction using small portions of solvents is more | ||
| A. | Reliable | ||
| B. | Efficient | ||
| C. | Rapid | ||
| D. | Slow | ||
| 42. | Silica gel and alumina are used as | ||
| A. | Mobile phase | ||
| B. | Stationary phase | ||
| C. | Mixed-phase | ||
| D. | Single phase | ||
| 43. | Shaking two immiscible liquids increases | ||
| A. | Length of contact | ||
| B. | Volume of contact | ||
| C. | Area of contact | ||
| D. | all of above | ||
| 44. | The solvent or mixture of solvents used for separation of compounds is called | ||
| A. | Stationary phase | ||
| B. | Mobile phase | ||
| C. | Dynamic phase | ||
| D. | Static phase | ||
| 45. | Which is not a sublime material | ||
| A. | Iodine | ||
| B. | Benzoic acid | ||
| C. | Ammonium chloride | ||
| D. | Potash alum | ||
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