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Question
Assertion :Natural rubber becomes stiff by the vulcanization with sulphur. Reason: Sulphur forms cross links at the reactive sites of double bonds in vulcanization.
Assertion :Natural rubber becomes stiff by the vulcanization with sulphur. Reason: Sulphur forms cross links at the reactive sites of double bonds in vulcanization.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Natural rubber becomes soft at high temperature and brittle at low temperatures. To improve the physical properties of rubber, vulcanization is carried out. This process consists of heating a mixture of raw rubber with sulphur and an appropriate additive at a temperature range between 373K and 415K.
On vulcanization, sulphur forms cross-links at the reactive sites of double bonds and thus the rubber gets stiffened.
Hence, option A is correct.
Natural rubber becomes soft at high temperature and brittle at low temperatures. To improve the physical properties of rubber, vulcanization is carried out. This process consists of heating a mixture of raw rubber with sulphur and an appropriate additive at a temperature range between 373K and 415K.
On vulcanization, sulphur forms cross-links at the reactive sites of double bonds and thus the rubber gets stiffened.
Hence, option A is correct.
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