chemical engineering polymer technology Mcqs
251. In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer ?
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A. Polycaprolactam

B. PTFE

C. PMMA

D. Buna-S
252. All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic_______________?
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A. Tubings

B. Filaments

C. Buckets

D. Pipes

253. ________________ is produced by polymerisation of chloroprene?
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A. Polyurethane rubber

B. Thiokol (a polysulphide rubber)

C. Butyl rubber

D. Neoprene
254. Nylon-66 is manufactured from ____________________?
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A. Maleic anhydride and Hexamethylene diamine

B. Adipic acid and Hexamethylene diamine

C. Dimethyl terephthalate (DMT) and ethylene glycol

D. Caprolactam

255. _____________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate?
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A. Rubbery

B. Hard

C. Fibrous

D. Leathery
256. Which of the following is not a condensation polymer ?
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A. Bakelite

B. None of these

C. Poly-methyl-methacrylate (PMMA)

D. Melamine polymer

257. Neoprene is chemically known as _________________?
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A. Polybutadiene

B. Poly chloroprene

C. Polyurethane

D. Styrene butadiene rubber (SBR)

258. _____________ is a homopolymer?
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A. Terylene

B. Nylon-66

C. Neoprene

D. Bakelite

259. Polycondensation reaction of polymerisation ___________________?
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A. Produces only thermoplastic material

B. Does not need any catalyst

C. Produces epoxy polymers

D. Does not produce linear polymers

260. Phenol formaldehyde is produced by condensation polymerisation. It is also known as_________________?
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A. Polyester

B. Nylon-66

C. Bakelite

D. Teflon

261. The major component of acrylic fibers is__________________?
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A. Polyesters

B. Polyolefins

C. Polyacrylonitrile

D. Polyamides

262. Which of the following is an elastomer ?
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A. Polystyrene

B. Thiokol

C. Urea formaldehyde

D. Phenol formaldehyde

263. Acrylonitrile is mainly used in the _____________ industry?
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A. Printing

B. Photographic

C. Polymer

D. Dyeing

264. Polystyrene is a light, transparent, thermoplastic material used for making __________________?
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A. Toys and combs

B. Non-sticking utensils

C. Electrical insulation

D. Packaging bags

265. Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to _________________?
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A. Increase its viscosity

B. Reduce the time of vulcanisation and quantity of vulcanising agent

C. Reduce its viscosity to permit easier processing

D. Protect rubber goods from attack by oxygen & ozone present in the atmosphere

266. Unbreakable crockeries are made from ______________ polymers?
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A. Melamine

B. Polystyrene

C. Polyurethane

D. Polystyrene

267. Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E. (poly chloro tetra fluoro ethylene). It is also called ________________?
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A. Epoxy resin

B. Teflon

C. Polyurethane

D. Silicone rubber

268. Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800 ?
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A. 51600

B. 50000

C. 50800

D. 49200

269. The monomer of natural rubber is A. DMT ______________________?
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A. Isoprene

B. 2 methyl-1 propane

C. Both B. and C.
270. Low density polythene as compared to high density polythene is____________________?
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A. Harder

B. Tougher

C. Chemically inert

D. More flexible
271. Pick out the wrong statement ?
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A. Sharp melting point is not observed in thermoplastic polymers

B. Property of tackiness is exhibited by uncured rubber

C. Polythene generally has an excellent resistance to ultra violet rays

D. Polymeric fibres are never produced by addition polymerisation
272. Buna-S is also called____________________?
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A. Teflon

B. SBR

C. Bakelite

D. Polyurethane

273. Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its__________________?
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A. Flexibility

B. All A., B. & C.

C. Chemical resistance

D. Tensile strength

274. Which of the following rubbers has the widest service temperature range (-75 to 275C) ?
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A. Butyl rubber

B. Nitrile rubber

C. Silicone rubber

D. Silicon rubber

275. Polycaprolactam is nothing but __________________?
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A. Nylon-66

B. Saran

C. Orlon

D. Nylon-6
276. Nylon-6 is a_________________?
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A. Thermosetting resin

B. Polyester

C. None of these

D. Polyamide
277. Which of the following is the lowest cost plastic commercially available ?
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A. Bakelite

B. Teflon

C. Polythene

D. PVC

278. Condensation polymerisation is not involved in the manufacture of_________________?
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A. Teflon

B. Polythene

C. Terylene

D. Nylon

279. Bristles of tooth brushes are made of_______________?
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A. Nylon-6

B. PVC

C. Nylon-66

D. Polystyrene

280. Flexible foam (for mattresses) are usually made of _________________?
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A. Polyamides

B. Silicone rubber

C. Polyurethanes

D. PVC

281. Ion exchange resins are made of____________________?
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A. Lucite

B. Polystyrene

C. Teflon

D. Sulphonated Bakelite
282. Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the ___________________?
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A. Electrical insulation purpose

B. Tanning of leather

C. Decorative laminates

D. Strengthening of plaster of Paris
283. Polymers are_________________?
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A. Sub-micromolecules

B. None of these

C. Macromolecules

D. Micro-molecules

284. Most of the fibre forming polymers are crystalline in nature, one of the exceptions being ______________ which is amorphous in nature?
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A. Polyacrylonitrile

B. Polyester

C. Nylon

D. Polypropylene

285. Which of the following is a copolymer ?
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A. Polythene

B. Bakelite

C. Teflon

D. PVC

286. Adipic acid is an intermediate in the manufacture of _____________________?
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A. Polystyrene

B. Nylon-66

C. Bakelite

D. Perspex