Question

(i) Arrange the following compounds in the ascending order of their basic strength and give reasons for your answer:
Methylamine, Aniline, Ethylamine, Diethyl ether
(ii) Name the monomers and the type of polymerization in each of the folloiwng polymers:
(a) Polyester (b) Bakelite

Answer 1

(i) Increasing order of basic strength is as follows:

Diethylether < Aniline < methylamine < ethylamine

Reason : $+I$ effect of alkyl groups increases the basic strength of acids and aromatic amines are weaker bases than aliphatic amines due to delocalisation of lone pair of electrons (resonance).

(ii) (a) Monomer f Polyester: Ethylene glycol and Terephthalic acid

Type of polymerisation: Condensation Polymerisation

(b) Monomer of Bakelite: Phenol and Formaldehyde

Type of polymersation : Condensation polymerisation