171. Which of the following polymers shows the highest anti-tacking properties ?
Melamine formaldehyde resin
Phenolic resin
Epoxy resin
Alkyd resin
✅ The correct answer is option A.
Polymer Technology MCQs
172. Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex ?
Ammonium alum
Potassium alum
both a & b
neither a nor b
✅ The correct answer is option C.
173. Vulcanisation of rubber does not increase its
elasticity
plasticity
ductility
none of these
✅ The correct answer is option B.
174. Which of the following has the weakest intermolecular forces ?
Polyisoprene
Nylon-66
Polystyrene
Bakelite
✅ The correct answer is option A.
175. Mastication of rubber means
its softening.
a treatment to retard its deterioration due to oxidation.
improving its curing rate.
depression of its freezing point.
✅ The correct answer is option A.
176. Rexin (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten
teflon
bakelite
SBR
PVC
✅ The correct answer is option D.
177. Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?
Ethylene glycol
Stearic acid estors
Tricresyl phosphate
Esters of phthalic acid
✅ The correct answer is option A.
178. Contact lenses for eyes are made of perspex, which is nothing but
polymethylmethacrylate
polystyrene
unsaturated polyester
polypropylene
✅ The correct answer is option A.
179. Automobile steering wheels are normally made of
cellulose acetate
cellulose nitrate
PVC
high density polythene
✅ The correct answer is option A.
180. Which of the following is not present in bagasse fibre ?
Cellulose
Lignin
Pentogens
None of these
✅ The correct answer is option D.