21. The repeating units of PTFE are
Cl2CH-CH3
F2 C = CF2
F3 C-CF3
FClC = CF2
✅ The correct answer is option B.
Polymer Technology MCQs
22. Polypropylene is preferred to polythene, because the former is
non-inflammable
harder
stronger
both(b) & (c)
✅ The correct answer is option D.
23. The synthetic fibres produced from __________ are known as rayon.
lignin
cellulose
polyamides
ethylene glycol
✅ The correct answer is option B.
24. __________ is not a polyester fibre.
Terylene
Dacron
Nylon
Polyacrylonitrite
✅ The correct answer is option C.
25. Teflon is
phenol formaldehyde
an inorganic polymer
polytetra florouethylene (PTFE)
a monomer
✅ The correct answer is option C.
26. The monomer for the production of neoprene rubber is
acetylene
chloroprene
isoprene
none of these
✅ The correct answer is option B.
27. The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is
polyvinyl alcohol
polyvinyl acetale
polyvinyl butyral
PVC
✅ The correct answer is option C.
28. Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.
resorcinol
phenol
para-cresol
melamine
✅ The correct answer is option D.
29. Alkyd resin is a/an
polyamide
polyester
polyolefin
addition polymer
✅ The correct answer is option B.
30. Identify the group in which all the polymers mentioned can be used to make fibres.
Butadiene copolymers, Polyamides, Urea aldehyde
Cellulose derivatives, Polyisoprene, Polyethylene
Cellulose derivatives, Polyamides, Polyurathane
Polypropylene, Poly vinyl chloride, Silicon
✅ The correct answer is option B.