Chapter 29

Nitrobenzene can be prepared from benzene by using a mixture of concentrated \(\mathrm{HNO}_{3}\) and concentrated \(\mathrm{H}_{2} \mathrm{SO}_{4} .\) In the nitrating mixture, nitric acid acts as a (a) base (b) acid (c) reducing agent (d) catalyst

Amongst the following, the most basic compound is (a) benzylamine (b) aniline (c) acetanilide (d) p-nitroaniline

Which of the following compounds is most basic here (a) diphenyl ammonia (b) dimethyl amine (c) guanidine (d) tri methyl amine

The compound that is most reactive towards electrophilic nitration is (a) benzene (b) nitrobenzene (c) benzoic acid (d) toluene

The melting point is highest for (a) primary amines (b) secondary amines (c) tertiary amines (d) quaternary amines

Carbylamine test is performed in alcoholic KOH by heating a mixture of (a) trihalogenated methane and a primary amine (b) an alkyl halide and a primary amine (c) an alkyl cyanide and a primary amine (d) chloroform and silver powder

Acetamide is treated separately with the following reagents. Which one of these would give methylamine? (a) sodalime (b) \(\mathrm{PCl}_{5}\) (c) \(\mathrm{NaOH}+\mathrm{Br}_{2}\) (d) hot conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)

Which of the following reacts with \(\mathrm{NaNO}_{2}+\mathrm{HCl}\) at \(273-278 \mathrm{~K}\) to give alcohol/phenol? (a) \(\mathrm{CH}_{3} \mathrm{NH}_{2}\) (b) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}\) (c) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{2} \mathrm{NHCH}_{3}\) (d) \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}\)

Hinsberg reagent is (a) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NO}\) (b) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~N}_{2} \mathrm{Cl}\) (c) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{SO}_{2} \mathrm{Cl}\) (d) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{SO}_{3} \mathrm{H}\)

The compound which one reaction with aqueous nitrous acid at low temperature produces an oily nitrosamine is (a) methylamine (b) ethylamine (c) triethylamine (d) diethylamine