Which of the following can be used to distinguish between primary and secondary amines?

Hinsberg's test

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Lucas' test

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Isocyanide test

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Victor Meyer's test

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Hinsberg's test
The correct options are (A) and (C).

(A) : Hinsberg's test is used to distinguish between primary and secondary amines.
A primary amine forms a precipitate of N-alkyl benzene sulphonamide with Hinsberg reagent. This precipitate is soluble in alkali.

$R N H_{2} + C_{6} H_{5} S O_{2} C l (H i n s b e r g r e a g e n t) ⟶ R - N H - S O_{2} - C_{6} H_{5}$

Secondary amine reacts with Hinsberg reagent to form a precipitate N,N-dialkyl benzene sulphonamide. But this precipitate is insoluble in alkali.

$R_{2} N H + C_{6} H_{5} S O_{2} C l (H i n s b e r g r e a g e n t) ⟶ R_{2} N S O_{2} C_{6} H_{5} (p r e c i p i t a t e)$

(C) : Isocyanide test or carbylamine reaction is used to distinguish between primary and secondary amines.
Primary amines on heating with chloroform and ethanolic potassium hydroxide form isocyanides or carbylamines which are foul-smelling substances. Secondary and tertiary amines do not show this reaction.

$R N H_{2} + C H C l_{3} + 3 K O H ⟶ R N C + 3 K C l + 3 H_{2} O$

Suggest Corrections

Similar questions

Which of the following is used to distinguish primary, secondary and tertiary amines

Join BYJU'S Learning Program