Chapter 27

The isocyanide test is used for the detection of (a) Primary alcohols (b) Primary amines (c) Secondary amines (d) Secondary alcohols

Primary amines on being heated with \(\mathrm{CS}_{2}\) in the presence of \(\mathrm{HgCl}_{2}\) form alkyl/ary! isothiocyanates. The reaction is known as (a) Hofmann hypobromite reaction (b) Hofmann climination reaction (c) Hofmann-Martius reaction (d) Hofmann mustard oil reaction

Benzoylation reaction in aqueous medium is known as (a) Claisen reaction (b) Schotten Baumann reaction (c) Perkin reaction (d) Reformatsky reaction

Benzenediazonium chloride on reaction with phenol in weakly basic medium gives (a) diphenyl ether (b) \(p\)-hydroxyazobenzene (c) chlorobenzene (d) benzene

The IUPAC name of the tertiary amine formed by the reaction of methylamine with ethyl bromide is (a) \(\mathrm{N}\), \(\mathrm{N}\)-dimethylethanamine (b) \(\mathrm{N}\), N-diethylmethanamine (c) N-ethyl-N-methylethanamine (d) \(\mathrm{N}, \mathrm{N}\)-diethylaminomethane

Which of the following is most basic in gas phase? (a) \(\mathrm{NH}_{3}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}\) (c) \(\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{2} \mathrm{NH}\) (d) \(\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{3} \mathrm{~N}\)

Among the following compounds, the one which will produce 1-phenylethanamine in Hofmann hypobromite reaction is (a) 2-phenylpropanamide (b) 3 -phenylpropanamide (c) 2-phenylethanamide (d) \(\mathrm{N}\)-phenylethanamide

Eithylamine can be prepared by the action of \(\mathrm{Br}_{2}\) and \(\mathrm{NaOH}\) solution on (a) Acetamide (b) Propionamide(c) Formamide (d) Methyl cyanide

Amongat the following the most basic compound is (a) Benzylamine (b) Aniline (c) Acetanilide (d) \(p\)-nitroaniline

In the \(\left(\mathrm{CH}_{1}\right)_{3} \mathrm{~N}\) molecule, the hybridization state of the nitrogen atom and the spatial arrangement of the methyl groups around it are respectively (a) \(s p^{3}\), tetrahedral (b) sp' pyramidal (c) \(s p^{2}\), trigonal planar (d) sp", trigonal planar

Amine-N-oxide on heating forms alkene. The reaction is called (a) Hofmann elimination (b) Saytref elimination (c) Cope elimination (d) Peterson elimination

The primary amine can be distinguished from a secondary amine by using (a) \(\mathrm{Br}_{2}\) and \(\mathrm{KOH}\) (b) \(\mathrm{HClO}\) (c) \(\mathrm{HNO}_{2}\) (d) \(\mathrm{NH}_{3}\)

Best method for preparing \(1^{\circ}\) amines from alkyl halides is by (a) Hofmann bromamide reaction (b) Gabriel phthalimide reaction (c) Both are equally good (d) Reaction with \(\mathrm{NH}_{3}\)

Which of the following is least basic? (a) \(\mathrm{FCH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}\) (c) \(\mathrm{ClCH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\) (d) All are equally basic

A compound A has a molecular formula \(\mathrm{C}_{7} \mathrm{H}_{7} \mathrm{NO} .\) On treatment with \(\mathrm{Br}_{2}\) and \(\mathrm{KOH}\), A gives an amine \(B\) which gives carbylamine test. B upon diazotisation and coupling with phenol gives an azo dye. \(\mathrm{A}\) can be (a) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CONHCOCH}_{3}\) (b) \(\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{CONH}_{2}\) (c) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NO}_{2}\) (d) \(0, \mathrm{~m}\) - or \(\mathrm{p}-\mathrm{C}_{6} \mathrm{H}_{4}\left(\mathrm{NH}_{2}\right) \mathrm{CHO}\)

Aniline is reacted with bromine water and the resulting produet is treated with an aqueous solution of sodium nitrite in presence of dilute HC1. The compound so formed is converted into tetrafluoroborate which is subsequently heated dry. The final product is (a) \(p\) - Ifromefluorobenzene (b) \(p\)-Bromoaniline (e) 2, 4, 6-Tribromofluorobenzene (d) \(1,3,5\)-Tribromobenzene

Butanenitrile may be prepared by heating (a) Propyl alcohol with \(\mathrm{KCN}\) (b) Butyl alcohol with KCN (c) Butyl chloride with KCN (d) Propyl chloride with \(\mathrm{KCN}\)

Benzamide on reaction with \(\mathrm{POCl}_{3}\) gives (a) Aniline (b) Chlorobenzene (c) Benzyl amine (d) Benzonitrile

\(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl} \stackrel{\mathrm{NaCN}}{\longrightarrow} \mathrm{X} \stackrel{\mathrm{Ni} / \mathrm{H}_{2}}{\longrightarrow} \mathrm{Y} \stackrel{\text { acetic anhydride }}{\longrightarrow} \mathrm{Z}\) Z. in the above reaction sequence is (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NHCOCH}_{3}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\) (c) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CONHCH}_{3}\) (d) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CONHCOCH}_{3}\)

The most basic compound amongst the following is (a) Benzylamine (b) Aniline (c) \(p\)-Nitroaniline (d) Ethanamide