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  9. Q140

RRB Group D (Level-1 posts) 2014 · Question 140 of 324

Vulcanization is a

  1. AMethod to degrade polymers
  2. BProcess connected with the making of voltaic cells
  3. CProcess of hardening of rubber by heating it with sulfurCorrect
  4. DScience of studying volcanoes

Answer: C. Process of hardening of rubber by heating it with sulfur

Official answer key verified. Detailed explanation coming soon.

Source: Railway Group-D Questions – Gorakhpur (16 Nov 2014) · reliable-secondary

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