Q.1
Polyvinyl acetate is never used for making
Q.2
Polymethyl methacrylate (PMMA) is known as
Q.3
A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of
Q.4
Which of the following is stretched into fibres?
Q.5
Flexible plastic pipes are made of
Q.6
Synthetic polymer produced by using terephthalic acid and ethylene glycol is
Q.7
Thermal pyrolysis of ethylene dichloride produces
Q.8
The monomer of poly vinyl chloride (PVC) is
Q.9
Molecular weight of polymers are in the range of
Q.10
Identify the group in which all the polymers mentioned can be used to make fibres.
Q.11
Acrylonitrile is mainly used in the __________ industry.
Q.12
Non sulphonated hard bakelites are not used for making
Q.13
Polyhexamethylene adipimide is also known as
Q.14
Vulcanisation of rubber does not increase its
Q.15
__________ fibres are made of polyamides.
Q.16
Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins.
Q.17
Epoxy resin is
Q.18
Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is
Q.19
Neoprene is rendered non-inflammable, because of
Q.20
Molecular weights of plastics ranges from
Q.21
Elastomers are
Q.22
Polymerisation process in which two or more monomers of chemically different nature take part is called
Q.23
Cellulose is the main contituent of most __________ fibres.
Q.24
Gutta parcha rubber is
Q.25
Which of the following is an elastomer?
Q.26
The repeating units of PTFE are
Q.27
Thiokol is nothing but
Q.28
Which of the following rubbers has the widest service temperature range (-75 to 275°C) ?
Q.29
Phenol formaldehyde is produced by condensation polymerisation. It is also known as
Q.30
Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.
Q.31
Polyesters are manufactured by the polycondensation reaction of
Q.32
Which of the following has the weakest intermolecular forces?
Q.33
__________ is a copolymer.
Q.34
The conversion of caprolactum in the above case is about __________ percent.
Q.35
Neoprene is chemically known as
Q.36
__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol).
Q.37
Silicone resins, which are highly water repellant and has good heat resistance can not be used
Q.38
Ebonite is a/an
Q.39
Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer.
Q.40
The monomer of natural rubber is
Q.41
Collapsible tubes for tooth paste are produced by __________ extrusion.
Q.42
Nitrile rubber is produced by the polymerisation of
Q.43
Cellulose content in bomboo fibre is about __________ percent.
Q.44
Thermocole (expanded polystyrene) is not used for
Q.45
Low density polythene as compared to high density polythene is
Q.46
Caprolactum, a raw material for the manufacture of nylon-6, is produced from
Q.47
Buna-N is also called
Q.48
Dacron is a
Q.49
Dacron is a/an
Q.50
Acrylonitrile-butadiene-styrene (ABS) copolymer, which is produced by blending styrene-acrylonitfile copolymer with butadiene based elastomer, is a/an
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