Which of the following compounds gives the dy | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The dye test is a characteristic reaction of primary aromatic amines. When primary aromatic amines like $Aniline$ $(C_6H_5NH_2)$ are treated with

Vedclass · Accepted Answer

Aniline

Vedclass · Answer

(A) The dye test is a characteristic reaction of primary aromatic amines. When primary aromatic amines like $Aniline$ $(C_6H_5NH_2)$ are treated with nitrous acid $(HNO_2)$ at $0-5 \ ^{\circ}C$,they form a diazonium salt. This diazonium salt then undergoes a coupling reaction with phenols or other aromatic amines to form azo dyes,which are colored compounds. Since $Aniline$ is a primary aromatic amine,it gives the dye test,whereas aliphatic amines like $Methylamine$ and $Ethylamine$ do not form stable diazonium salts at these temperatures,and $Diphenylamine$ is a secondary amine.

List-$I$ (Test)	List-$II$ (Characteristic group)
$A.$ Carbylamine test	$I.$ Phenol
$B.$ Bayer's test	$II.$ Acetone
$C.$ Iodoform test	$III.$ Ethylene
$D.$ Phthalein dye test	$IV.$ Aniline

Which of the following compounds gives the dye test?

Similar Questions

Match List-$I$ with List-$II$:
List-$I$ (Test) List-$II$ (Characteristic group)
$A.$ Carbylamine test $I.$ Phenol
$B.$ Bayer's test $II.$ Acetone
$C.$ Iodoform test $III.$ Ethylene
$D.$ Phthalein dye test $IV.$ Aniline
Choose the correct answer from the options given below:

Which one of the following nitro-compounds does not react with nitrous acid?

Which among the following reagents is used to distinguish primary $(1^{\circ})$,secondary $(2^{\circ})$,and tertiary $(3^{\circ})$ amines according to their solubility in an alkaline medium?

Which of the following reagents gives the carbylamine test when heated with $KOH$ and a primary amine?

Which of the following will react with $CHCl_{3} +$ alc. $KOH$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module