The compound formed in the positive test for nitrogen with the Lassaigne’s solution of an organic compound is

The empirical formula of a compound is CH₂O. If its vapour density is 90, then the molecular formula of the compound is

The latest technique for the purification of organic compounds is

An alkane has a C/H ratio (by mass) of 5.1428. Its molecular formula is

If nitrogen and sulphur both are present in an organic compound, then during the Lassaigne’s test, both will change into

What is the molecular formula of a compound, if its empirical formula is CH₂O and its molecular weight is 90?

On ignition, 0.3585 g of platinum, 0.98 g of the platinichloride of diacid base left. The molecular weight of the base is

The liquids, which boil under ordinary pressure without decomposition and are associated with non-volatile impurities, are purified by

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

A liquid decomposes at its normal pressure. It can be purified by