Buna-S is a synthetic copolymer of:

  • Styrene and Buta-1,3-diene

  • Styrene and Ethylene

  • 1,3-Butadiene and Ethylene

  • None of the above

Buna rubber is a polymer of:

  • 1,3-butadiene.

  • Vinyl acetate.

  • Styrene.

  • None of the above.

An example of biopolymer is

  • teflon

  • neoprene

  • nylon-66

  • DNA

Buna-S is a polymer of -
  • Butadiene and Styrene
  • Butene and Styrene
  • Butadiene and Chloroprene
  • Butene and Salicylaldehyde

An example(s) of co-polymer among the following options is :

  • Nylon-6,6

  • Terylene.

  • Buna-S.

  • All of the above.

Which of the following is used to make non stick cookware ?

  • PVC

  • Polysterene

  • Polyethylene

  • PTFE

Polyethene, PVC, teflon and neoprene are example of -

  • Homopolymer.

  • Addition hetropolymer.

  • Biodegradable polymer.

  • Copolymer.

Product (E) is "

  • Nylon 66

  • Nlyon 6

  • Styrene

  • Polystyrene

Acetate rayon is prepared from:

  • acetic acid

  • glycerol

  • starch

  • cellulose

Rubber is heated with sulfur and the process is known:

  • galvanization

  • vulcanization

  • bessemerization

  • sulphonation

Terylene is a:

  • Polyamide                     

  • Polyester

  • Polyether                       

  • Long chain hydrocarbon

Thermosetting plastics are:

  • Cross-linked polymers

  • Don’t melt or soften on heating

  • Cross-linking is usually developed at the time of moulding where they harden irreversibly

  • All of the above

Which are true for terpolymer?

  • Contains three monomers

  • ABS plastic

  • A polymer of acrylonitrile, butadiene and styrene

  • All of the above

Which is/are true for elastomers?

  • These are synthetic polymers possessing elasticity

  • These possess very weak intermolecular forces of attractions between polymer chains

  • Vulcanised rubber is an example of elastomer

  • All of the above

If N1, N2, N3,.... are the number of molecules with molecular masses M1, M2, M3..... respectively, then mass average molecular mass is expressed.

 

  •  ΣNiMi2ΣNiMi

  •  ΣNiMiΣNi

  •  ΣMi2ΣNi

  •  ΣNiMiΣMi

A copolymer of vinyl chloride and vinyl acetate is called:

  • Vinylon

  • Saran

  • Dynel

  • Orlon

In vulcanisation of rubber:

  • Sulphur reacts to form new compound.

  • Sulphur cross-links are introduced which resists wear and tear due to friction.

  • Sulphur forms a very thin protective layer over rubber.

  • All of the above.

The starting materials of PCTFE are:

  • monochloro trifluoro ethylene

  • tetrafluoroethylene

  • vinyl chloride

  • styrene

The abbreviation PDI refers to:

  • name of the polymer

  • polydispersity index of polymer

  • application of polymer

  • poly diagonal index

Caprolactam can be obtained from:

  • benzaldehyde

  • cyclohexane

  • benzophenone

  • adipic acid

The monomer units of silicons a water repellant, acid resistant and heat resistant polymer is:

  • Si                         

  • SiO2

  • R2SiO                   

  • None of these

A polymer of acrylonitrile is called as-

  • Saran

  • Orlon

  • Dacron

  • Tetron

Which one of the following pairs is not correctly matched?

  • Terylene—condensation polymer of terephthalic acid and ethylene glycol

  • Teflon—thermally stable cross-linked polymer of phenol and formaldehyde

  • Perspex—a homopolymer of methyl methacrylate

  • Synthetic rubber —a copolymer of butadiene and styrene

Natural silk and artificial silk differ in one respect that one of them contains:

  • N                     

  • S

  • P                       

  • none of these

Among the given options , the one that is not fibre is: 

  • Terylene.

  • Nylons.

  • Polyacrylonitrile.

  • Polychloroprene.

Which of the following cannot be grouped as polyolefins?

  • Polystyrene                     

  • Polypropene

  • Polystyrene                     

  • Polyoxyethene

The monomer units of PTFE are:

  • Cl2CH-CH3

  • F2C=CF2

  • F3C-CF3

  • FClC=CF2

Among the given polymers, an example of homopolymer is:

  • Bakelite

  • Nylon-6,6

  • Terylene

  • Neoprene

Number average molecular mass (Mn) and mass average
mol. mass (M¯w)of synthetic polymers are related as:

  •  Mn < M¯w

  •  Mn > M¯w

  •  Mn = M¯w

  • Mn > Mw

Which of the following is wrong?

  • PMMA is called plexiglass

  • PTFE is called teflon

  • SBR is called natural rubber

  • LDPE is called low density polyethylene

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