Which of the following compounds gives a brig | vedclass

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

Question

(C) The reaction described is the dye test,which involves the formation of a diazonium salt followed by an azo coupling reaction with $\beta$-naphthol

Vedclass · Accepted Answer

$p-CH_3C_6H_4NH_2$

Vedclass · Answer

(C) The reaction described is the dye test,which involves the formation of a diazonium salt followed by an azo coupling reaction with $\beta$-naphthol to form an azo dye.Primary aromatic amines $(ArNH_2)$ react with $NaNO_2/HCl$ at $0-5^{\circ}C$ to form stable diazonium salts,which then undergo coupling with $\beta$-naphthol to produce a bright orange or red dye.Option $A$ is a tertiary amine,which forms a nitroso compound,not a diazonium salt.Option $B$ is a secondary amine,which forms an $N$-nitrosoamine.Option $C$ is $p$-toluidine,a primary aromatic amine. It forms a diazonium salt with $NaNO_2/HCl$,which then couples with $\beta$-naphthol to form a bright dye.Option $D$ is benzylamine,an aliphatic primary amine. Its diazonium salt is highly unstable and decomposes to form alcohol and nitrogen gas,thus it does not form a stable dye.

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 a bright dye upon reaction with $NaNO_2$ in dilute $HCl$ followed by coupling with an alkaline solution of $\beta$-naphthol?

Similar Questions

The carbylamine test is used to detect the presence of a primary amino group in an organic compound. Which of the following compounds is formed when this test is performed with aniline?

Compound $P$ is neutral. $Q$ gives effervescence with $NaHCO_3$ while $R$ reacts with Hinsberg's reagent to give a solid soluble in $NaOH$. Compound $P$ is:

Ethyl amine and aniline can be distinguished by

Assertion: Benzene diazonium chloride does not give a test for nitrogen.
Reason: Loss of $N_2$ gas takes place during heating.

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:

Vedclass Test Series

Exam Paper Generator

Online Exam Module