The monomer of neoprene is
1,3-butadiene
2-chloro-1,3-butadiene
2-methyl-1,3-butadiene
vinyl chloride
Example of a biodegradable polymer pair is
nylon-6, 6 and terylene
PHBV and dextron
bakelite and PVC
PET and polyethylene
The polymer obtained with methylene bridges by condensation polymer is
PVC
buna-S
polyacrylonitrile
bakelite
Observe the following polymers.
I. PHBV
II. Nylon-2-nylon-6
III. Glyptal
IV. Bakelite
Biodegradable polymer(s) from the above is/ are
III
I and II
IV
III and IV
Which one of the following is not used as an initiator in ionic polymerisation?
NaNH2
SnCl2
AlCl3
(C6H5CO)2O2
Natural rubber is formed by polymerisation of which of the following?
Phenol
Isoprene
Chloroprene
Styrene
Which of the following is the thermosetting plastic?
Nylon
Bakelite
Polythene
Polystyrene
B.
Bakelite
Low molecular weight semi-solid substances which when heated in a mould undergo change in chemical composition to give a hard, infusible and insoluble mass, and are known as thermosetting plastic.