NEET

If methyl is alkyl group, then which order of basicity is correct

R₂NH > RNH₂ > R₃N > NH₃
R₂NH > R₃N > RNH₂ > NH₃
RNH₂ > NH₃ > R₂NH > R₃N
NH₃ > RNH₂ > R₃NH > R₃N

Solution

R₂NH > RNH₂ > R₃N > NH₃

a
b
c
d

Solution

a
b
c
d

Solution

In (b), (c) and (d) lone pair of nitrogen is linked with sp² hybridised carbon which is acidic in nature therefore it attracts the electron pair towards itself. In (a) lone pair of nitrogen is free because it is attached with carbon which is sp³ hybridised. So it is most basic.

The end product of the reactions is
\(C_{2}H_{5}NH_{2} \overset{HNO_{2}}{\rightarrow} A \overset{PCl_{5}}{\rightarrow} B \overset{H.NH_{2}} {\rightarrow} C\)

ethyl cyanide
ethyl amine
methyl amine
acetamide

Solution

The structural formula of methyl aminomethane is

(CH₃)₂CHNH₂
(CH₃)₃N
(CH₃)₂NH
CH₃NH₂

ethane nitrile
acetic acid
ethanamine
chloroethane

Solution

benzonitrile
benzaldehyde
benzoic acid
benzylamine

Solution

Primary amines react with benzaldehyde to form:

diazonium salts
azo dyes
anilides
schiff’s base

Solution

Nitrosoamines (R₂N – N = O) are soluble in water. On heating them with concentrated H₂SO₄, they give secondary amines.This reaction is called

Perkin reaction
Sandmeyer's reaction
Fitting reaction
Liebermann nitroso reaction

Solution

The given reaction is known as Liebermann Nitroso reaction.

Azo dye is prepared by the coupling of phenol and

diazonium chloride
o-nitroaniline
benzoic acid
chlorobenzene

Solution

UnAttempted

0

Attempted

0

Correct

0

Wrong

0

Attempted

Correct

UnAttempted

Wrong