Statement-1 : In vulcanisation of rubber, sulphur cross links
are introduced.
Statement-2 : Vulcanisation is a free radical initiated chain
reaction.
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Answer:
Both Statement 1 and 2 are true but 2 is not correct explanation of Statement 1
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Both assertion and reason are correct but reason is not the correct expansion of assertion.
Step by step explanation:
- Vulcanization is a method of processing natural rubber under heating with sulfur or other sulphur compounds in order to modify its properties.
- This cross-linking gives the rubber its mechanical strength.
- About 5 percent of sulphur is used to produce rubber for tire, and 30 percent for producing rubber for the battery case.
- To increase rate of vulcanization reaction we can add zinc oxide.
- Enhanced properties of vulcanised rubber are:
- Low water absorption tendency
- High elasticity
- Resistance to oxidation reaction.
The structure of vulcanized rubber is as follows(in attachment).
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