Which one of the following reaction sequences | vedclass

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

Question

(A) The formation of an azo dye involves the coupling reaction of a diazonium salt with an electron-rich aromatic compound like $\beta$-naphthol in an

Vedclass · Accepted Answer

Nitrobenzene $\xrightarrow[(ii) NaNO_2/HCl]{(i) Sn/HCl}$ $\xrightarrow[(iii) \beta-	ext{naphthol}, NaOH]{}$

Vedclass · Answer

(A) The formation of an azo dye involves the coupling reaction of a diazonium salt with an electron-rich aromatic compound like $\beta$-naphthol in an alkaline medium.$1$. Nitrobenzene $(C_6H_5NO_2)$ is reduced to aniline $(C_6H_5NH_2)$ using $Sn/HCl$.$2$. Aniline reacts with $NaNO_2/HCl$ at $0-5^{\circ}C$ to form benzenediazonium chloride $(C_6H_5N_2^+Cl^-)$.$3$. Benzenediazonium chloride undergoes a coupling reaction with $\beta$-naphthol in the presence of $NaOH$ to form an orange-red azo dye.Therefore,the correct sequence is given in option $A$.

List-$I$	List-$II$
$A$. Amide	$I$. Carbylamine reaction
$B$. Nitrile	$II$. Hinsberg's reagent
$C$. $C_6H_5SO_2Cl$	$III$. Hofmann's bromamide reaction
$D$. $1^{\circ}$-Amine	$IV$. $LiAlH_4$

List-$I$ (Compounds)	List-$II$ (Reactions)
$A. \ CH_3(CH_2)_3NH_2$	$(i)$ Alkaline hydrolysis
$B. \ CH_3C\equiv CH$	$(ii)$ With $KOH$ (alc.) and $CHCl_3$ produces bad smell
$C. \ CH_3CH_2COOCH_3$	$(iii)$ Gives white ppt. with ammoniacal $AgNO_3$
$D. \ CH_3CH(OH)CH_3$	$(iv)$ With Lucas reagent cloudiness appears after $5 \ minutes$

Which one of the following reaction sequences will give an azo dye?

Similar Questions

Amongst the compounds given,the one that would form a brilliant colored dye on treatment with $NaNO_2$ in dil. $HCl$ followed by addition to an alkaline solution of $\beta$-naphthol is

Match the following:
List-$I$ List-$II$
$A$. Amide $I$. Carbylamine reaction
$B$. Nitrile $II$. Hinsberg's reagent
$C$. $C_6H_5SO_2Cl$ $III$. Hofmann's bromamide reaction
$D$. $1^{\circ}$-Amine $IV$. $LiAlH_4$

Benzyl isocyanide can be obtained from which of the following reactions? Choose the correct answer from the options given below:
$A$. Benzyl bromide + $AgCN$
$B$. Benzylamine + $CHCl_3$ + $Aq. NaOH$
$C$. Bromobenzene + $AgCN$
$D$. Aniline + $CHCl_3$ + $Aq. NaOH$
$E$. $2-$Phenylethyl bromide + $KCN$

What are $X$ and $Y$ respectively in the following set of reactions?

Vedclass Test Series

Exam Paper Generator

Online Exam Module