How is nitrogen detected by Lassaignes test?

What is Lassaigne's test?

What is Lassaigne's test?

Proteins are detected by

Sometimes a red colour is not produced in the Lassaignes test even if both nitrogen and sulphur are present in the Organic compound. Explain

Write the chemical equations involved in the detection of N, halogen and sulphur present in an organic compound by Lassaigne's test.

Justify the following statements. i. Water mixed with formic acid cannot be separated by fractional distillation. ii. o -nitrophenol is steam volatile while p-nitrophenol is not. iii. Freshly prepared FeSO_4 solution is insisted during the test for nitrogen in Lassaignes test. iv. Copper spiral is used in the apparatus for Dumas method.

How is nitrogen prepared in the laboratory? Write the chemical equation of the reaction involved.

Which of the following can be detected by carbylamine reaction-