Preparation of Diazonium Salts

Identify Z in the change after diazotisation and sand Meyer's reaction.

${\text{C}}_6{\text{H}}_5{\text{NH}}_2\underset{\text{280 K}}{\overset{{\text{NaNO}}_2/\text{HCl}}{\to }}\mathit{\text{X}}\stackrel{\text{CuBr}/\text{HBr}}{\to }\mathit{\text{Z}}$

Phenol reacts with benzenediazonium cation at pH 7.5 to give

Consider the following statements
Phenyl diazonium forms azodye with
$1.$ aniline
$2.$ phenol
$3.$ N, N-dimethylaniline
$4.$ anisole (methoxybenzene)

The reaction of ethyl p-aminobenzoate with $\mathrm{H}\mathrm{N}{\mathrm{O}}_2$ and then with $\mathrm{H}\mathrm{B}{\mathrm{F}}_4$ yields a compound (X), a crystalline ionic compound. Compound (X) when heated forms ${\mathrm{C}}_9{\mathrm{H}}_9{\mathrm{O}}_2\mathrm{F}\left(\mathrm{Y}\right)$ . The compound (Y) is

In which of the reaction formation of Diazonium salt takes place?

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

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

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:

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