COMEDK Exam 2022 Solved Paper

Only aliphatic primary amines can react with nitrous acid to produce alcohol, water and nitrogen gas.
R

━

1−amine

NH2+HONO

273−278K

⟶

R

━

Alchohol

OH+N2+H2O
So, dimethylamine which is a secondary amine cannot liberate N2 with HONO.