Q.

In vulcanization, natural rubber is heated with-

A. Carbon
B. Sulphur
C. Silicon
D. Phosphorus
Answer» B. Sulphur
Explanation: Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur, which results in three-dimensional cross- linking of the chain rubber molecules(polyisoprene) bonded to each other by sulfur atoms.
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