Polymers are
A low molecular mass compounds
B inorganic substances
C high molecular mass macromolecules
D simple hydrocarbons
Polymers consist of repeating structural units.
The repeating unit of a polymer is called
A polymer
B monomer
C oligomer
D macromolecule
Monomers join to form polymers.
Polymerisation is the process of
A breaking polymers
B forming monomers
C linking monomers to form polymers
D oxidation of monomers
Small units combine to form long chains.
Which is a natural polymer
A nylon
B PVC
C cellulose
D polystyrene
Cellulose occurs naturally in plants.
Which is a synthetic polymer
A proteins
B starch
C rubber
D polyethylene
Manufactured industrially.
Classification of polymers based on source includes
A addition and condensation
B linear and branched
C natural and synthetic
D elastomers and fibres
Based on origin.
Polymers classified as thermoplastics are
A cross-linked
B rigid
C soften on heating
D irreversibly hardened
Can be remoulded repeatedly.
Bakelite is an example of
A thermoplastic
B elastomer
C thermosetting polymer
D fibre
Forms rigid cross-linked structure.
Elastomers are characterised by
A high rigidity
B extensive cross-linking
C elastic nature
D high crystallinity
Stretchable and return to original shape.
Natural rubber is an example of
A thermoplastic
B thermoset
C elastomer
D fibre
Shows elastic behaviour.
Fibres are polymers which are
A soft and elastic
B hard and brittle
C strong and thread-like
D sticky
Used in textiles.
Nylon-6,6 is prepared by condensation of
A hexamethylenediamine and adipic acid
B ethene and benzene
C caprolactam
D styrene
Condensation polymer.
Terylene (PET) is formed from
A ethylene glycol and terephthalic acid
B ethylene and benzene
C glycerol and fatty acid
D caprolactam
Polyester formation.
Which polymer is biodegradable
A PVC
B polythene
C nylon
D PHBV
Biodegradable polyester.
Addition polymerisation involves
A elimination of small molecule
B free radical mechanism
C ionic hydrolysis
D oxidation
No by-product formed.
Condensation polymerisation involves
A free radicals
B elimination of small molecules
C ionic addition
D rearrangement
Water, HCl etc. are eliminated.
Polyethylene is formed by polymerisation of
A ethyne
B ethane
C ethene
D propane
Addition polymerisation.
PVC is polymer of
A vinyl alcohol
B vinyl chloride
C ethyl chloride
D chloroethane
CH₂=CHCl monomer.
Polystyrene is obtained from
A benzene
B ethylbenzene
C styrene
D toluene
Vinyl benzene monomer.
Which polymer is used in non-stick cookware
A PVC
B polythene
C Teflon
D nylon
PTFE has low friction.
Teflon is polymer of
A tetrafluoroethene
B chloroethene
C difluoroethane
D fluoroethane
PTFE structure.
Vulcanisation of rubber involves addition of
A chlorine
B oxygen
C sulphur
D nitrogen
Forms cross-links.
Vulcanisation improves
A softness
B elasticity and strength
C solubility
D brittleness
Cross-linking enhances properties.
Buna-S rubber is copolymer of
A butadiene and styrene
B butadiene and acrylonitrile
C isoprene and styrene
D ethene and propene
Synthetic rubber.
Buna-N rubber is polymer of
A isoprene
B butadiene and acrylonitrile
C styrene and ethene
D vinyl chloride
Oil-resistant rubber.
Copolymers are formed from
A one monomer
B two or more monomers
C only natural monomers
D only synthetic monomers
Improves properties.
Which polymer is used for making ropes
A nylon
B polystyrene
C PVC
D bakelite
High tensile strength.
Thermosetting polymers cannot be reshaped because
A they melt
B they are linear
C they are cross-linked
D they are elastic
Permanent network structure.
Which polymer is used as electrical insulator
A rubber
B bakelite
C cellulose
D silk
Heat-resistant and non-conducting.
Polymerisation of styrene is an example of
A condensation polymerisation
B addition polymerisation
C step-growth
D ionic polymerisation
Double bond opens.
Linear polymers have
A cross-linked chains
B branched chains
C straight long chains
D network structure
Close packing possible.
Branched polymers have
A only straight chains
B side chains attached
C cross-links
D rigid structure
Reduce crystallinity.
Which polymer is used in making bulletproof vests
A nylon
B kevlar
C terylene
D PVC
Very high strength fibre.
Kevlar is a
A polyester
B polyamide
C polyolefin
D polycarbonate
Aromatic polyamide.
Degree of polymerisation indicates
A molecular mass
B number of monomer units
C polymer type
D solubility
Average chain length.
Which polymer is biodegradable
A polythene
B PVC
C nylon-6
D polylactic acid
Derived from renewable sources.
Thermoplastics are generally
A cross-linked
B linear or slightly branched
C rigid network
D infusible
Allows softening on heating.
Polymer used for water pipes is
A nylon
B PVC
C bakelite
D polystyrene
Durable and corrosion-resistant.
Which polymer is used in making toys and containers
A polystyrene
B bakelite
C nylon
D rayon
Light and easily moulded.
Rayon is known as
A natural fibre
B synthetic fibre
C semi-synthetic fibre
D inorganic fibre
Derived from cellulose.
Which polymer is also called artificial silk
A nylon
B rayon
C polyester
D acrylic
Mimics silk appearance.
Polymerisation initiated by peroxides is
A ionic
B condensation
C free radical
D coordination
Peroxides form radicals.
Ziegler–Natta catalyst is used for
A condensation polymerisation
B free radical polymerisation
C coordination polymerisation
D oxidation
Produces stereoregular polymers.
Which polymer is high density polyethylene
A HDPE
B LDPE
C PVC
D PS
Linear structure gives high density.
LDPE has
A linear chains
B branched chains
C cross-linked chains
D aromatic rings
Low density due to branching.
Which polymer is used in making disposable cups
A nylon
B polystyrene
C PVC
D rubber
Lightweight and cheap.
Polymer used in making raincoats
A wool
B nylon
C PVC
D rayon
Waterproof material.
Which polymer is resistant to chemicals and heat
A polythene
B bakelite
C rubber
D rayon
Thermosetting polymer.
Cross-linking increases
A solubility
B elasticity
C rigidity
D conductivity
Network structure forms.
Correct statement is
A All polymers are biodegradable
B Addition polymerisation releases water
C Natural rubber is an elastomer
D Bakelite is thermoplastic
Shows elastic behaviour.