The correct order of the basic strength of the following are
I>II>III>IV
IV>II>III>I
III>IV>II>I
III>II>IV>I
Which of the following sodium compound/compound (s) are formed when an organic compound containing both nitrogen and sulphur is fused with sodium?
Cyanide and sulphide
Thiocyanate
Sulphite and Cyanide
Nitrate and sulphide
Which of the following is an example of carbylamine reaction?
2Ph NH2 + CS2 Ph- NCS
R - NH2 + HNO2 R - OH + N2 + HCl
Ph - NH2 + CHCl3 + 3KOH (alc.) ph - NC + 3KCl + 3H2O
Ph2 - NH + HONO Ph2 - N - N O + H2O
C3H9N reacts with Hinsberg reagent and the product is insoluble in alkali but soluble in ether. This nitrogen containing compound is
primary amine
secondary amine
tertiary amine
methyl isocyanide
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.