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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

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) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{SO}_{3} \mathrm{H}\)

When acetamide is treated with \(\mathrm{NaOBr}\), the product formed is (a) \(\mathrm{CH}_{3} \mathrm{OH}\) (b) \(\mathrm{CH}_{3} \mathrm{NH}_{2}\) (c) \(\mathrm{CH}_{3} \mathrm{CN}\) (d) \(\mathrm{CH}_{3} \mathrm{COBr}\)

Which of the following compounds cannot by identified by carbylamine test? (a) \(\mathrm{CHCl}_{3}\) (b) \(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{NH}-\mathrm{C}_{6} \mathrm{H}_{5}\) (c) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}\) (d) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}\)