Chemistry : Organic Chemistry – Some Basic Principles and Techniques

How will you test the presence of halogen in an organic compound by Lassaigne's test?

Why is it necessary to boil the Lassaigne's extract with concentrated nitric acid before testing for halogens?

Will CCl₄ give white precipitate of AgCl on heating it with silver nitrate? Give reason for your answer.

How will you detect the presence of bromine and iodine present in an organic compound by carbon disulphide test?

Write a short note on Beilstein test.

How will you detect the presence of phosphorus in an organic compound?

Explain the reason for the fusion of an organic compound with metallic sodium for testing nitrogen, sulphur and halogens.

What do you understand by the estimation of elements? Discuss breifly a method for the estimation of carbon and hydrogen in an organic compound.

On complete combustion,  0.246 g of an organic compound gave 0.198g of carbon dioxide and 0.1014 g of water. Determine the percentage composition of carbon and hydrogen in the compound. 

0.25 g of an organic compound containing carbon, hydrogen and oxygen was analysed by the combustion method. The increase in mass of calcium chloride tube and the potash bulbs at the end of the operation was found to be 0.15 mg and 0.1837 g respectively. Calculate the percentage composition of the compound.