Answer to Question #214188 in Organic Chemistry for roozet rooz

Question

Lassaigne’s test can be performed for the detection of hetero-elements present in organic compounds by fusing the compound with active metal like sodium.

a. What is the purpose of preparing sodium extract or Lassaigne’s solution?

b. Write the reactions involved in detection of Nitrogen in organic compound?

c. Why sodium extract is alkaline in nature?

Answer 1

a) The sodium fusion extract, SFE can be used to detect the presence of chlorine, bromine and iodine but not fluorine. To detect their presence, the SFE is first acidified with HNO3 and then added with AgNO3 solution.

b)

c) Because the organic compound is fused with sodium metal and then it is extracted with water. The unreacted metal reacts with water and forms an alkaline solution.