Multiple choice

Which of the following is not a characteristic of vulcanised rubber?

  1. It does not melt upon heating.

  2. It is resistant to chemical attack.

  3. It is an insoluble thermosetting polymer.

  4. It possesses weak covalent bonds.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 When rubber is vulcanised, it becomes cross-linked. This linking of stronger bonds makes vulcanised rubber over 10 times stronger than natural rubber. 

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