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Question

Natural rubber is heated with an element X to make it hard, strong and more elastic. X is:

A
zinc
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B
sulphur
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C
lead
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D
H2
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Solution

The correct option is C sulphur
Natural Rubber is heated in the presence of sulphur. This produces cross-linking and leads to a harder material that is markedly more resistant to heat and relatively more elastic. This process is called vulcanization.

Option B is correct.


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