Q.1
Pick out the wrong statement.
Q.2
Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber?
Q.3
Which of the following polymers does not belong to the class of polyacrylate polymer?
Q.4
__________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.
Q.5
Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its
Q.6
In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.
Q.7
Vulcanisation of raw rubber makes it
Q.8
Nylon-6 as compared to nylon-66 is
Q.9
Buna-S is a __________ material.
Q.10
Density of high density polythene is about __________ gm/c.c.
Q.11
Which of the following is a polymer of hexamethylene diamine and adipic acid?
Q.12
Linear polymers are normally
Q.13
Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation?
Q.14
Perspex can be used as a substitute of glass. Its monomer is
Q.15
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?
Q.16
Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding
Q.17
Tyres are made by
Q.18
Starting material for the production of SBR is
Q.19
Nylon-66 compared to nylon-6 has
Q.20
Which of the following is not a natural fibre?
Q.21
Thermoplastic resins usually
Q.22
Thermosetting materials
Q.23
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?
Q.24
Viscose rayon is
Q.25
Vulcanisation of rubber
Q.26
__________ tubes are good substitude for human blood vessels onrheart by-pass operation.
Q.27
Pick out the wrong statement.
Q.28
Thermosplastic materials
Q.29
Which of the following is an inorganic polymer?
Q.30
__________ practically possess no elasticity.
Q.31
Nylon 6 as compared to nylon 6, 6 has lower
Q.32
In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher
Q.33
Terylene is a/an
Q.34
Styrene butadiene rubber (SBR) is
Q.35
Synthetic rubber
Q.36
Which of the following is generally not used as eord for synthetic rubber tyre casing?
Q.37
Teflon is
Q.38
Styrene butadiene rubber is commercially manufactured by
Q.39
Styrene which is a monomer for the production of polystyrene, is commercially produced by the
Q.40
Which of the following is a copolymer?
Q.41
Which of the following is a copolymer?
Q.42
Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its
Q.43
Branched chain polymers compared to linear polymers have higher
Q.44
The rate controlling step in the manufacture of silicone rubber is the
Q.45
In nylon-6, the number 6 represents the total number of
Q.46
Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used
Q.47
Terylene is
Q.48
Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces
Q.49
Pick out the wrong statement.
Q.50
Which of the following is not a condensation polymer?
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