Multiple choice

In vulcanization, natural rubber is heated with _____.

  1. Carbon

  2. Sulphur

  3. Silicon

  4. Phosphorus

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vulcanization is the chemical process where natural rubber is heated with sulphur to cross-link the polymer chains. This process significantly improves the rubber's properties including elasticity, strength, and temperature resistance. Charles Goodyear discovered this process in 1839.