Q.1
Bristles of tooth brushes are made of
Q.2
In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?
Q.3
The main use of butadiene is
Q.4
Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is
Q.5
Valcunisation of rubber decreases its
Q.6
Silicone is a/an
Q.7
Poly tetra flouro ethylene (PTFE) is known as
Q.8
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
Q.9
Adipic acid is an intermediate in the manufacture of
Q.10
Alkyd resin can not be used for making
Q.11
Which of the following polymers is used for making a non stick coating on frying pans?
Q.12
Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the
Q.13
Liners of bags are usually made of
Q.14
Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.
Q.15
Rain coats are made of
Q.16
Rayon is a __________ fibre.
Q.17
Glyptal used in the manufacture of paints & lacquers is a __________ polymer.
Q.18
Nylon 6, 10 which is used for bristles making is superior to nylon 6, 6 due to its lower water absorption capacity, is a/an
Q.19
__________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR.
Q.20
Phosphates (e.g., triceresyl, tributyl, tetrabutyl, tripheyl etc.) are added to polymers to act as
Q.21
In condensation polymerisation as compared to addition polymerisation
Q.22
__________ polymer is used for making unbreakable crockery.
Q.23
Polymers are
Q.24
Polythene is a/an
Q.25
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?
Q.26
Poly Vinyl chloride (PVC) is a __________ material.
Q.27
Pick out the wrong statement regarding the solubility characteristics of high polymers.
Q.28
Pick out the wrong statement.
Q.29
Polycaprolactum is
Q.30
Polyvinyl alcohol is used as a
Q.31
Polyvinyl chloride (PVC)
Q.32
Commercial production of polypropylene employs __________ polymerisation.
Q.33
Amino resins are used in paper treatment to improve its
Q.34
Polycaprolactum is nothing but
Q.35
Cross linked polymers formed from bi-and trifuctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties.
Q.36
__________ is produced by polymerisation of chloroprene.
Q.37
Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to
Q.38
Phenol formaldehyde
Q.39
Phthalic anhydride is used
Q.40

Cellulose acetate has very high film permeability among all the polymers of the order ofgm/m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?

  • Water impermeable cellophane
  • Polythene
  • Cellulose acetate
  • Teflon
Q.41

Addition polymerisation is not involved in the manufacture of

  • low density polythene.
  • poly vinyl chloride.
  • polystyrene.
  • polyhexamethylene adipamide.
Q.42

Buna-N is also called

  • butyl rubber
  • nitrile rubber
  • neoprene
  • thiokol
Q.43

Viscosity of a polymer solution or melt

  • decreases with increase in molecular weight.
  • decreases with increase in temperature.
  • increases with increase in temperature.
  • does not vary with temperature rise.
Q.44

Which of the following is not a polymer of two monomers ?

  • Teflon
  • Bakelite
  • SBR
  • None of these
Q.45

Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are

  • 5°C and 1 kgf/cm2.
  • - 20°C and 1 kgf/cm2.
  • 0°C and 1 kgf/cm2.
  • 0°C and 3 kgf/cm2.
Q.46

Polypropylene is preferred to polythene, because the former is

  • non-inflammable
  • harder
  • stronger
  • both(b) & (c)
Q.47

Nylon-6 as compared to nylon-is

  • harder.
  • more abrasion resistant.
  • having higher melting point.
  • none of these.
Q.48

Flexible foam (for mattresses) are usually made of

  • PVC
  • silicone rubber
  • polyurethanes
  • polyamides
Q.49

Pick out the correct statement.

  • Plastics are good conductors of heat and electricity.
  • All the polymers are highly crystalline in nature
  • Polymers can be vaporised by heating to a very high temperature.
  • The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation.
Q.50

__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.

  • Fibrous
  • Leathery
  • Rubbery
  • Hard
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