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Question
In vulcanisation, natural rubber is heated with
Options:
A .  Carbon
B .  Silicon
C .  Sulphur
D .  Phosphorous
Answer: Option C
Vulcanization is a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. The process involves the formation of cross-links between long rubber molecules so as to achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.

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