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WorksheetsRubber
Total questions: 12
Worksheet time: 6mins
Which substance is a natural polymer?
polythene
polyisoprene
polypropene
polyvinyl chloride
A rubber tapper finds that latex coagulates after several hours. What substance should be added into the latex to prevent it from coagulating?
Formic acid
Sodium chloride solution
Ammonia solution
Nitric acid
Charles Goodyear (December 29, 1800 – July 1, 1860) was an American self-taught chemist and manufacturing engineer who developed vulcanized rubber.
Nowadays in industrial vulcanization, latex is heated or exposed to _______________ to produced vulcanized rubber.
ammonia solution
disulphur dichloride
concentrated hyrdochloric acid
methanoic acid
The aircraft tyres are made from vulcanized rubber. What property of vulcanized 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 take the tremendous stress and strength
Substance P turns white latex milk into yellow solid. What is substance P?
Ammonia solution
Ethanoic acid
Potassium hydroxide solution
Potassium chloride solution
A lorry wants to transfer latex from a rubber estate to a rubber factory. Which substance can be added to the latex to prevent it from coagulating?
Distilled water
Tetrachloromethane
Acetic acid
Diluted sodium hydroxide solution
Which of the following is the correct structure of vulcanised natural rubber?
Which of the following is the monomer of natural rubber?
The protein membrane of natural rubber is surrounded by negative charge. What is the name of a process if the natural rubber is added with ethanoic acid?
Vulcanisation
Polymerisation
Coagulation
Hydrogenation
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
What is vulcanization?
A process whereby rubber is reacted with oxygen.
A process whereby rubber is reacted with sulphur
A process whereby rubber is reacted with methanoic acid
A process whereby rubber is reacted with ammonia
What is the IUPAC name of the molecule shown in the diagram?
2-methylbut-1,3-diene
Isoprene
3-methylbut-1,3-diene
