Which of the following compounds gives carbylamine test?
N-methyl-o-methyl aniline
N, N-dimethyl aniline
2, 4-diethyl aniline
p-methyl-N-methyl benzylamine
Which of the following is 3° amine?
1-methylcyclohexylamine
Triethyl amine
Tert-butylamine
N-methyl aniline
Which of the following is most basic in nature?
NH3
CH3NH2
(CH3)2NH
C6H5N(CH3)2
C.
(CH3)2NH
Basicity of amines depends upon the availability of lone pair of nitrogen for donation. Electron mreleasing group like -CH3 increases the basicity of amines by increasing electron density over nitrogen, which facilitate the donation of lone pair of electrons.
Electron withdrawing groups like -Ph group withdraws electrons and thus, make amines less basic by decreasing electron density over nitrogen. Hence, the order of basic nature of the given amines is
(CH3)2NH > C6H5N(CH3)2 > CH3NH2 > NH3
Thus, (CH3)2NH is most basic.
In which of the following, NH3 is not used?
Tollen's reagent
Nessler's reagent
Group reagent for the analysis of IV group basic radicals
Group reagent for the analysis of III group basic radicals
Amine that cannot be prepared by Gabriel phthalimide synthesis is
aniline
benzylamine
methylamine
iso-butylamine
Lactose is made of
-D-glucose only
-D-glucose and -D-glucose
-D-galactose and -D-glucose
-D-galactose and -D-glucose
Gabriel phthalimide reaction is used for the preparation of
primary aromatic amines
secondary amines
primary aliphatic amines
tertiary amines
During, acetylation of amines, what is replaced by acetyl group ?
Hydrogen atom attached to nitrogen atom
One or more hydrogen atoms attached to carbon atom
One or more hydrogen atoms attached to nitrogen atom
Hydrogen atoms attached to either carbon atom or nitrogen atom
Electrolytic reduction of nitrobenzene in weakly acidic medium gives
aniline
nitrosobenzene
N-phenylhydroxylamine
p-hydroxyaniline