An organic substance on analysis was found to contain 10.06 percent carbon, 0.84 percent hydrogen and 89.10 percent chlorine. Its empirical formula is

The most suitable method for the separation of a 1:1 mixture of ortho- and para- nitrophenols is

In an experiment, 0.1877g of an organic compound when analyzed by the Dumas method yielded 31.7 ml of moist nitrogen measured at 14⁰C and 758 mm mercury pressure. The percentage of nitrogen in the compound is (Aqueous tension at 14⁰C = 12 mm)

Which of the following has molecular weight of  92 ?

In the detection of sulphur in an organic compound, sodium nitropruside solution is added to the Lassaigne’s test solution. A purple color is obtained due to the formation of

An organic compound containing C, H and N gave the following analysis: C = 40%, H = 13.33% and N = 46.67%. The empirical formula of the compound would be

Concentrated nitric acid is added to Lassaigne’s extract in the detection of halogen to

The two impure substances, which do not have large differences in their solubilities, are purified by

If a sample of organic substance is heated strongly with soda-lime in a test tube, then ammonia is evolved. It indicates the presence of

 The percentage of N₂ in urea is