Question

The process of heating rubber with sulphur to improve its hardness is known as ________.

• A. pulping
• B. vulcanisation
• C. sulphonation
• D. recycling

Answer 1

The correct option is B vulcanisation

Natural rubber is obtained from the sap of rubber trees. It is soft and elastic.

In order to make the rubber stronger, and more flexible, it is heated with sulphur for few hours. This process is called vulcanisation. Vulcanised rubber is more resistant to heat, and other environmental conditions.