- 1(current)
Q. No.0.284 g of an organic substance gave 0.287 g AgCl in a carius method for the estimation of halogen. The percentage of Cl in the compound is-
1. 5%
2. 18%
3. 25%
4. 33%
Match Column I with Column II.
| Column I | Column II | ||
| A. | Dumas method | 1. | AgNO3 |
| B. | Kjeldahl’s method | 2. | Silica gel |
| C. | Carius method | 3. | Nitrogen gel |
| D. | Chromatography | 4. | Ammonium sulphate |
Choose the correct answer from the options given below:
| A | B | C | D | |
| 1. | 3 | 4 | 1 | 2 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 3 | 2 |
Metallic sodium is fused with organic compounds for testing nitrogen, sulphur, and halogens. The correct reason behind this is:
| 1. | To convert all compounds to their ionic form. |
| 2. | Sodium reduces the compounds. |
| 3. | Sodium converts all compounds in their covalent form. |
| 4. | None of the above. |
In Duma's method of estimation of nitrogen, 0.35 g of an organic compound gave 55 ml of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be:
(Aqueous tension at 300 K = 15 mm)
1. 16.45
2. 27.45
3. 44.45
4. 35.45
A compound that does not give a positive test in Lassaigne’s test for nitrogen is-
| 1. | Urea | 2. | Hydrazine |
| 3. | Azobenzene | 4. | Phenyl hydrazine |
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Q. No.
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