Synthetic and natural polymers
Exam Duration: 45 Mins Total Questions : 30
Which one of the following is used as a substitute of wool fibre?
- (a)
nylon 66
- (b)
teflon
- (c)
ethyl acrylate
- (d)
acrylonitrile
Which one of the following is not a natural rubber?
- (a)
polybutadiene
- (b)
polychloroprene
- (c)
polyisoprene
- (d)
buna-S
The plastic household crockery is prepared using
- (a)
malonic acid and hexamethylene diamine
- (b)
melamine and tetrafluoroethene
- (c)
malamine and vinyl acetate
- (d)
malamine and formaldehyde
The length of the chain of the polymer can be controlled during polymerisation by the addition of a reagent called
- (a)
toners
- (b)
inhibitors
- (c)
initiators
- (d)
poison
Commercial name of PMMA is
- (a)
lucite
- (b)
plexiglass
- (c)
acrylite
- (d)
all of these
Which one of the following is used for coating articles and cookwares to make them non-sticky?
- (a)
giyptal
- (b)
nylon-6
- (c)
nylon 66
- (d)
PTTE
The correct strength of the polymer on the basis of the magnitude of intermolecular forces is
- (a)
elastomer > thermoplastic > fibres > thermosetting
- (b)
thermosetting > fibres > thermoplastics > fibre > thermosetting
- (c)
thermosetting > fibres > thermoplastics > elastomers
- (d)
None of these
Simple molecules from which a polymer is made up of are called
- (a)
monomer
- (b)
repeating unit
- (c)
isomer
- (d)
tautomer
Which of the following polymers of glucose is stored by animals?
- (a)
Cellulose
- (b)
Amylose
- (c)
Amylopectin
- (d)
Glycogen
Which of the following is an example of elastomer?
- (a)
Vulcanised rubber
- (b)
Dacron
- (c)
Polystyrene
- (d)
Malamine
Thermoplastics are
- (a)
cross-linked polymers
- (b)
molten polymer can be moulded indesired shape
- (c)
soften or melt on heating
- (d)
All of the above
Bakelite is an example of
- (a)
elastomer
- (b)
fibre
- (c)
thermoplastic
- (d)
thermosetting polymer
A copolymer is obtained by polymerisation of
- (a)
one type of monomer units
- (b)
two types of monomer units
- (c)
three types of monomer units
- (d)
None of the above
Example of condensation polymer is
- (a)
teflon
- (b)
dacron
- (c)
polystyrene
- (d)
neoprene
Melamine formaldehyde resin is
- (a)
an addition polymer
- (b)
a copolymer
- (c)
a fibre type polymer
- (d)
dimer of melamine formaldehyde
Polyisobutylene is obtained by
- (a)
free radical polymerisation
- (b)
cationic polymerisation
- (c)
anionic polymerisation
- (d)
coordination polymerisation
Biodegradable polymers are
- (a)
degraded by microorganisms within a suitable period
- (b)
soluble in water
- (c)
Both (a) and (b)
- (d)
None of the above
Arrange the following monomers in order of decreasing ability to undergo cationic polymerisation
\(I.\quad { NO }_{ 2 }{ C }_{ 6 }{ H }_{ 5 }-CH={ CH }_{ 2 }\)
\(II.\quad { CH }_{ 2 }=CH-{ C }_{ 6 }{ H }_{ 5 }{ CH }_{ 3 }\)
\(III.\quad { CH }_{ 2 }=CH-{ C }_{ 6 }{ H }_{ 5 }OCH_{ 3 }\)
- (a)
I > II > III
- (b)
II > I > III
- (c)
III > II > I
- (d)
I > III > II
Relation between number of average molecular mass \(\left( \overline { { M }_{ n } } \right) \) and weight of average molecular mass \(\left( \overline { { M }_{ w } } \right) \) of synthetic polymers is
- (a)
\(\bar { { M }_{ n } } <\bar { { M }_{ w } } \)
- (b)
\(\bar { { M }_{ n } } >\bar { { M }_{ w } } \)
- (c)
\(\bar { { M }_{ n } } =\bar { { M }_{ w } } \)
- (d)
\({ M }_{ n }>{ M }_{ w }\)
The polymer containing strong intermolecular forces, like hydrogen bonding is
- (a)
teflon
- (b)
nylon-66
- (c)
polystyrene
- (d)
natural rubber
Nylon threads are made up of
- (a)
polyvinyl polymer
- (b)
polyester polymer
- (c)
polyamide polymer
- (d)
polyethylene polymer