Which of the following amines will not give N 2 gas on treatment with nitrous acid ( NaNO 2+ HCl ) ?

Question

Which of the following amines will not give N 2 gas on treatment with nitrous acid ( NaNO 2+ HCl ) ? (A) C2H5NH2 (B) CH3NH2 (C) ( CH 3)2 CH - NH 2 (D) All will give N2

Tardigrade Admin · Accepted Answer

All aliphatic primary amines liberate N2 gas on treatment with HNO2 . R - NH2 + HONO xrightarrow273-278 K R - OH + N2 + H2O Since no other class of amines liberate N2 gas on treatment with HNO2 , this reaction is used as a test for aliphatic primary amines.

Q. Which of the following amines will not give $N_{2}$ gas on treatment with nitrous acid $(N a N O_{2} + H Cl)$ ?

$C_{2} H_{5} N H_{2}$

$C H_{3} N H_{2}$

$(C H_{3})_{2} C H - N H_{2}$

All will give $N_{2}$

All aliphatic primary amines liberate $N_{2}$ gas on treatment with $H N O_{2}$ .

$R - N H_{2} + H ONO 273 - 278 K R - O H + N_{2} + H_{2} O$

Since no other class of amines liberate $N_{2}$ gas on treatment with $H N O_{2}$ , this reaction is used as a test for aliphatic primary amines.

Q. Which of the following amines will not give N2​ gas on treatment with nitrous acid (NaNO2​+HCl) ?

C2​H5​NH2​

CH3​NH2​

(CH3​)2​CH−NH2​

All will give N2​