Question

Which of the following amines liberates nitrogen gas when treated with nitrous acid?

Options

• (CH₃)₂NH

• (CH₃)₂CHNH₂

• C₆H₅NH₂

• CH₃NH₂

Answer 1

(CH₃)₂CHNH₂

Explanation:

\[\ce{Primary amines ->[HNO2] N2 ^}\]

\[\ce{Secondary amines ->[HNO2] \underset{(yellow oil)}{Nitrosoamine}}\]

\[\ce{Tertiary amine ->[HNO2] Colourless solution}\]

\[\ce{\underset{1° amine}{(CH3)2CHNH2} + HNO2 -> (CH3)2CHOH + H2O + N2_{(g)}}\]