Aniline was acetylated and an acetanilide is formed. The acetanilide on nitration followed by alkaline hydrolysis gave:

1. o-Nitroacetanilide

2. o- and p-Nitroaniline

3. m-Nitroaniline

4. Acetanilide

In the chemical reactions,

$\underset{\mathrm{HCl}, 278 \mathrm{K}}{\overset{{\mathrm{NaNO}}_2}{\to }}A\stackrel{HB{F}_4}{\to }B$

the compounds 'A' and 'B' respectively are:

1. nitrobenzene and chlorobenzene

2. nitrobenzene and flurobenzene

3. phenol and benzene

4. benzene diazonium chloride and fluorobenzene

Which of the following reactions is appropriate for converting acetamide to methanamine ?

(1) Carbylamine reaction

(2) Hoffmann Bromamide reaction

(3) Stephens reaction

(4) Gabriels phthalimide synthesis

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

A given nitrogen-containing aromatic compound a reacts with Sn/HCl, followed by HNO₂ to give an unsatable compound B.B, on treament with phenol, forms a beautiful coloured compound C with the molecular formula C₁₂H₁₀N₂O. The structure of compound A is

The correct statement regarding the basicity of arylamines is

(1) Arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalized by interaction with the aromatic ring p-electron system.

(2) Arylamines are generally more basic than alkylamines because of aryl group.

(3) Arylamines are generally more basic than alkylamines, because the nitrogen atom in arylamines is sp-hybridized

(4) Arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring p-electron system.

Which of the following will be most stable diazonium salt $R{\mathrm{N}}_2^{+}{X}^{-}$ ?

(a) ${\mathrm{CH}}_3{\mathrm{N}}_2^{+}{\mathrm{X}}^{-}$

(b) ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{N}}_2^{+}{\mathrm{X}}^{-}$

(c) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{N}}_2^{+}{\mathrm{X}}^{-}$

(d) ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2{\mathrm{N}}_2^{+}{X}^{-}$

Which of the following is more basic than aniline ?

1. Diphenylamine

2. Triphenylamine

3. p-nitroaniline

4. Benzylamine

Which of the following compounds will not give Hoffmann bromamide reaction?
 

1.
2.
3.
4.

1.           

2.  

3.       

4.  

Identify the major product (A) formed in the following reaction/\.

1.               2.  

3.        4.