MCQ
In vulcanisation of rubber,
- ASulphur reacts to form new compound.
- ✓Sulphur cross links are introduced.
- CSulphur forms a very thin protective layer over rubber.
- DAll of the above.
✓
Answer
Correct option: B.
Sulphur cross links are introduced.
In vulcanisation of rubber, sulphur cross links are introduced. Natural rubber is mixed with $3$ to $5\%$ sulphur and heated at $100−150^\circ C$ to form cross linking of cis$-1, 4$ polyisoprene chains through disulphide bonds $(-S-S-).$ Vulcanization of rubber makes it more strong, tough and elastic.
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