Preparation of Diazonium Salts

How will you convert aniline into benzyl alcohol.

How to convert Benzene into 3-Bromophenol.

How will you convert 2-Bromo-4-aminotoluene into 2-Bromobenzoic acid.

Convert 3-methylaniline into 3-nitrotoluene

p-(dimethylamino) azobenzene is a yellow dye which was formerly used as a colouring agent in margarine. Write the structures of the reactants used in the preparation of this dye. 

How to convert Aniline into Benzamide and Benzamide into Aniline.

Incorrect statement(s) regarding this reaction

Possible product(s) is/are:

Predict respectively $\mathrm{\prime }\mathrm{X}\mathrm{\prime }$ and $\mathrm{\prime }\mathrm{Y}\mathrm{\prime }$ in the following reactions

$\mathrm{Ar}-{\mathrm{NH}}_2\stackrel{\mathrm{X}}{\to }\mathrm{Ar}-{\mathrm{N}}^{\oplus }\equiv \mathrm{N}-{\mathrm{Cl}}^{⊝}\mathrm{ }\stackrel{\mathrm{Y}}{\to }\mathrm{Ar}-\mathrm{Cl}\mathrm{ }$

${\mathrm{N}}_2$ gas is liberated when $[\mathrm{H}\mathrm{C}\mathrm{l}+\mathrm{N}\mathrm{a}\mathrm{N}{\mathrm{O}}_2]$ reacts with the following compound

A. $\mathrm{C}{\mathrm{H}}_3\mathrm{C}{\mathrm{H}}_2\mathrm{N}{\mathrm{H}}_2$

B. Urea

C. $\mathrm{C}{\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{N}{\mathrm{H}}_2$

D. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{N}{\mathrm{H}}_2$

The answer is

A compound $\left[\mathrm{A}\right]$ on treatment with excess ${\mathrm{N}\mathrm{H}}_3$ gives $\left[\mathrm{B}\right]$ in presence of ${\mathrm{Z}\mathrm{n}\mathrm{C}\mathrm{l}}_2$ at $300°\mathrm{C}$. $\left[\mathrm{B}\right]$ on treatment with ${\mathrm{C}\mathrm{H}\mathrm{C}\mathrm{l}}_3$ and $\mathrm{K}\mathrm{O}\mathrm{H}$ gives phenyl isocyanide. The diazonium salt from $\left[\mathrm{B}\right]$ gives $\left[\mathrm{C}\right]$ with ethanol. The incorrect option is:

${\mathrm{C}}_6{\mathrm{H}}_6\mathrm{ }\underset{{\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4}{\stackrel{\mathrm{H}\mathrm{N}{\mathrm{O}}_3}{\to }}\hspace{1em}\mathrm{ }\underset{\mathrm{F}\mathrm{e}}{\stackrel{\mathrm{C}{\mathrm{l}}_2}{\to }}\mathrm{ }\left[\mathrm{X}\right]\underset{\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}}{\stackrel{\mathrm{S}\mathrm{n}}{\to }}\mathrm{ }\left[\mathrm{Y}\right]$
$\underset{\mathrm{\Delta }}{\stackrel{\mathrm{H}\mathrm{C}\mathrm{l}}{\to }}\mathrm{ }\hspace{1em}\stackrel{\bar{\mathrm{O}}\mathrm{H}}{\to }\hspace{1em}\left[\mathrm{Z}\right]\mathrm{ }\stackrel{\mathrm{H}\mathrm{N}{\mathrm{O}}_2,\mathrm{ }{\mathrm{H}}_3\mathrm{P}{\mathrm{O}}_2}{\to }\mathrm{ }\left[\mathrm{P}\right]$
Which of the following are correct?

When aniline is treated with a mixture of sodium nitrite and hypophosphorus acid, the product formed is

For the preparation of p-nitroiodobenzene from p-nitroaniline, the best method is

In order to convert aniline into chlorobenzene the reagent used is

The ion formed by the reaction of $\mathrm{H}\mathrm{N}{\mathrm{O}}_2$ and ${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4$is

${\mathrm{N}}_2$ gas is liberated when $\left[\mathrm{H}\mathrm{C}\mathrm{l}+\mathrm{N}\mathrm{a}\mathrm{N}{\mathrm{O}}_2\right]\mathrm{ }$reacts with which of the following compounds?

(A) $\mathrm{C}{\mathrm{H}}_3\mathrm{C}{\mathrm{H}}_2\mathrm{N}{\mathrm{H}}_2$ (B) Urea

(C) $\mathrm{C}{\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{N}{\mathrm{H}}_2$ (D) ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{N}{\mathrm{H}}_2$

When aniline is treated with sodium nitrite and hydrochloric acid at $0\mathrm{℃}$, it gives

Which will not go for diazotization?

Aniline in a set of reactions yielded a product $\mathrm{D}$.



The structure of the product $\mathrm{D}$ would be: