251. Polystyrene is a light, transparent, thermoplastic material used for making
toys and combs
packaging bags
non-sticking utensils
electrical insulation
✅ The correct answer is option A.
Polymer Technology MCQs
252. In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is
terylene
polybutadiene
PVC
polypropylene
✅ The correct answer is option A.
253. Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.
-20 to 25
50 to 75
100 to 150
250-280
✅ The correct answer is option D.
254. Thermosetting polymers as compared to thermoplastic polymers
are formed by addition polymerisation.
have three dimensional structure.
have linear structure.
none of these.
✅ The correct answer is option B.
255. Thermosplastic materials
do not soften on application of heat.
are heavily branched molecules.
are solvent insoluble.
none of these.
✅ The correct answer is option D.
256. Which of the following is an elastomer ?
Thiokol
Phenol formaldehyde
Urea formaldehyde
Polystyrene
✅ The correct answer is option A.
257. Synthetic polymer produced by using terephthalic acid and ethylene glycol is
terylene
nylon-66
PVC
polyesterene
✅ The correct answer is option A.
258. __________ is produced by polymerisation of chloroprene.
Thiokol (a polysulphide rubber)
Butyl rubber
Neoprene
Polyurathane rubber
✅ The correct answer is option C.
259. Starting material for the production of butadiene in India is
naphthalene
benzol
ethyl alcohol
phthalic anhydride
✅ The correct answer is option C.
260. Which of the following is not a natural fibre?
Silk
Viscose rayon
Wool
Cotton
✅ The correct answer is option B.