Question

Write a chemical test to distinguish between aniline and methylamine

Answer 1

test to distinguish between aniline and methylamine is azo test Ch3+HNO2 +HCI =Ch3OH +Ch2=Ch2+Ch3Ch2CL+N2 now aniline C6H5NH2+HNO2+HCl to form C6H5N2Cl+H2O

Answer 2

Explanation: Azodye test:

Treat aniline and methylamine with sodium nitrite with hydrochloric acid at zero degree Celsius.

In case of aniline : stable diazonium salt will be formed which will give phenol  on hydrolysis.

In case of methylamine, unstable diazonium salt of aliphatic amine will be formed which will further get decompose into nitrogen gas and methanol.