=> Ans. Chain growth polymers: Polythene, polyacrylonitrile and
polyvinyl chloride.
5➤ Define: Synthetic fibres.
=> Ans. The man-made fibres prepared by polymerization of one monomer
or copolymerization of two or more monomers are called synthetic
fibres.
6➤
ive one example each of copolymer homopolymer.
=> Ans. Homopolymer: PVC, Nylon-6 Copolymer: Terylene, Buna-S
7➤
What type of intermolecular force leads to high density polymer?
=> Ans. High density polymers have low degree of branching along the
hydrocarbon chain. The molecules are closely packed together. during
crystallization. This closer packing means that the van der Waals
attraction between the chains are greater and so the plastic (high
density polymer) is stronger and has a melting point.
8➤
Arrange the polymers in increasing order of their intermolecular forces:
Nylon-6,6, Polythene, Buna-S.
=> Ans. The increasing order of their intermolecular forces of
attraction follows the order: Buna-S. Polythene, Nylon-6.6.
9➤
Write the name and structure of the monomer units of butyl rubber.
=> Ans. The CH, monomer units of butyl rubber: Isobutylene CH,
CH₂=C-CH, and isoprene CH₂=C-CH=CH₂
10➤
Which of the two is a copolymer PVC or PHBV?
=> Ans. The copolymer is PHBV.
11➤
Write the names of biodegradable polymers.
=> Ans. PHBV i.e. Polyhydroxy butyrate-CO-/-hydroxy valerate, Dextron,
Nylon-2-nylon-6 are biodegradable polymers.
12➤
Write the number of carbon atoms present in the monomer used for
preparation of nylon 6 polymer.
=> Ans: The monomer unit of nylon 6 (e-caprolactam) contains 6 carbon
atoms.
13➤
Write the name of the catalyst used for preparation of high density
polythene polymer.
=> Ans: Zieglar-Natta catalyst (triethylaluminium with titanium
tetrachloride)
14➤
Write the name of the catalyst used for preparation of high density
polythene polymer.
=> Ans: Zieglar-Natta catalyst (triethylaluminium with titanium
tetrachloride)
15➤
Monomer used for preparation of polyacrylonitrile is
=> Ans: acrylonitrile (CH₂=CHCN)
16➤
Monomers ethylene glycol and terephthalic acid condensation polymerization
to give polymer called
=> Ans: terylene (or Dacron)
17➤ Monomer of natural rubber iS
=> Ans: isoprene
18➤
Write the name of biodegradable polymer formed by two amino acids namely
glycine and c-amino caproic acid.
=> Ans: Nylon 2-nylon 6
19➤
Functional group present in terylene polymer is
=> Ans: carboxylic acid
20➤
Write the name of the polymer obtained by polymerization of
2-chloro-1,3-butadiene
