WorksheetsPlastics
Total questions: 16
Worksheet time: 9mins
Plastics contain ___________________, which are long chains of molecules that manufacturers can mold, cast or force through a die into desired shapes.
pigments
polymers
core walls
chamfers
Pick the synthetic fibre out of the following?
Cotton
Nylon
Jute
Wool
Which is a thermosetting plastic?
Melamine
Polythene
PVC
Nylon
Which of the following is not a common property of plastics?
Non-reactive
Light in weight
Durable
Good conductor of electricity
A polymer is a chain of many small units joined together which are called (a) .
The synthetic fibres are also known as (a) fibres.
The chemical name of cotton is (a) .
A chain of repeating units (called monomers)
monomer
dimer
replicate
polymer
Once formed, it can be heated and reformed over and over again
thermoset
thermoplastic
elastomer
kevlar
True or False: All polymers are synthetic.
True
False
Copolymers can be described as:
A polymer formed with the same monomer repeated
A polymer that is thermoflexible
A polymer formed with different types of monomers
A polymer formed by condensation
Thermosets can be described as:
polymers formed by addition reactions
plastics that cannot be moulded once they are set with temperature and pressure
plastics that can be remoulded everytime with temperature
plastics formed with the monomer hexanedioic acid
This is the best type of plastic to recycle:
thermoplastics
thermosets
synthetic polymers
polyamide
What should be done to natural rubber to produce tyres that are harder and more heat resistant?
heat with sulphur
add iron wire
add ammonia solution
add ethanoic acid
Which of the following is true about vulcanized and unvulcanized rubber?
Vulcanized rubber is less elastic than unvulcanized rubber
Vulcanized rubber become soft and sticky easily compared to unvulcanized rubber
Vulcanized rubber is stronger than unvulcanized rubber
Vulcanized rubber is more easily oxidised than unvulcanized rubber
Synthetic rubber is a type of .................. polymer.
elastomer
thermoplastic
thermosetting
