WorksheetsVulcanisation of Rubber
Total questions: 10
Worksheet time: 5mins
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
The aircraft tyres are made from vulcanised rubber. What property of vulcanised rubber makes it suitable to be used for making these aircraft tyres?
it resist to oxidation
it is harder and stronger
it can maintain their elasticity
it can withstand tremendous stress
Which of the following is the correct structure of vulcanised natural rubber?
Which of the following is not the property of natural rubber?
Sensitive to heat
Elasticity decreases over time
Easily oxidized by air
Hard and brittle
Which synthetic rubber can be used to manufacture medical implants?
Silicone rubber
Neoprene
Nitrile rubber
Styrene-butadiene
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 made by polymerisation of
Acetylene
Divinylacetylene
Chloroprene
Vinylacetate
Synthetic rubber is a type of .................. polymer.
elastomer
thermoplastic
thermosetting
Among the following which is the natural polymer?
Bakelite
PVC
a thermoplastic is:
terylene
polythene
all the above
