Question

The process of vulcanization makes rubber:
(A) Soluble in water,
(B) Elastic,
(C) Hard,
(D) Durable

• A. (A), (B), (C) only
• B. (B) and (C) only
• C. (A), (B), (C), and (D)
• D. (B), (C), and (D) only

Hint:

Vulcanization enhances rubber by introducing sulfur cross-links which create a stable three dimensional network in the polymer chains, thus improving its properties like elasticity, tensile strength, and durability.

Answer 1

The Correct Option is B

Vulcanization, a chemical process involving heating rubber with sulfur, achieves the following:
• Forms disulfide bridges, creating cross-links between the polymer chains of natural rubber.
• Increases elasticity by restricting polymer chain movement.
• Enhances hardness, durability, and tensile strength.
• Decreases solubility in solvents.
In summary, vulcanization improves rubber's elasticity and hardness.