Assertion (A):	CCl4 doesn't give precipitate of AgCl on heating with AgNO3.
Reason (R):	CCl4 is a non-polar molecule.

 

1.	(A) is true and (R) is the correct explanation of (A).
2.	(A) is true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false

0.26 g of an organic compound gave 0.039 g of water and 0.245 g of carbon dioxide on combustion. The percentage of C in the organic compound is-

1. 35%

2. 25%

3. 2%

4. 90%

In an estimation of sulphur by the carius method, 0.2175 g of the substance gave 0.5825 g of BaSO₄ . The percentage composition of S in the compound is-

1. 66%

2. 20%

3. 37%

4.82%

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%

0.24 g of an organic compound containing phosphorous gave 0.66 g of Mg₂P₂O₇ by the usual analysis. The percentage of phosphorous in the compound is-

1. 77%

2. 72%

3. 87%

4. 60 %

0.1688 g organic compound when analyzed by the Dumas method yields 31.7 mL of moist nitrogen measured at 14º C, and 758 mm mercury pressure. The % of nitrogen in the organic compound (Aqueous tension at 14 º C =12 mm) is-

1. 30.9%

2. 10%

3. 40%

4. 21.9 %

The latest technique for isolation, purification and separation of organic compounds is -

1. Crystallisation

2. Distillation

3. Sublimation

4. Chromatography

The method that can be used to separate two compounds with different solubilities in a solvent is-
1. Distillation
2. Isolation
3. Fractional crystallization
4. Filtration

Lassaigne's test can detect:

1. Nitrogen, Sulphur, Halogens

2. Nitrogen, Cyanides, Sulphur

3. Sodium, Sulphur, Halogens, Phosphorus

4. Nitrogen, Sulphur, Halogens, Phosphorus

Halogen in an organic compound that can be detected by -