Q.

Which one of the following statements is not correct? Vulcanisation of rubber makes it -

A. soft and flexible
B. strong and hard
C. chemical resistant
D. withstand higher temperatures
Answer» A. soft and flexible
Explanation: In order to give more strength and more elasticity, natural rubber is heated with sulphur or sulphur compounds at 150°C temperature. Vulcanized rubber has good tensile strength. The working temperature of vulcanized rubber is enhanced up to 100°C. It has good resistance to organic solvents.
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