Q.

Vulcanized rubber contains sulphur –

A. 2%
B. 3-5%
C. 7-9%
D. I 0- 5%
Answer» B. 3-5%
Explanation: A vulcanized flexible tyre rubber contains about 3 -5% of sulphur whereas hard rubber (ebonite) contains about 32% of sulphur. The stiffness of vulcanized rubber depends on the amount of sulphur added.
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