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प्रश्न
What is the role of sulphur in the vulcanisation of rubber?
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उत्तर १
Rubber is made of hydrocarbon chains, basically carbon and hydrogen. These chains slide over one another and get tied to one another which leads to natural rubber being sticky. When sulphur is used in the vulcanisation process, it reacts with these chains and forms disulphide (or similar) bonds. Sulphur forms cross linkages at the reactive sites of the double bonds because of which rubber gets stiffened.
उत्तर २
In vulcanization, sulphur forms cross-link at the reactive sites of double bonds of natural rubber so the rubber gets stiffened.
संबंधित प्रश्न
What is natural rubber?
(A) Cis-1,4-polyisoprene
(B) Neoprene
(C) Trans-1,4-polyisoprene
(D) Butyl rubber
How does the presence of double bonds in rubber molecules influence their structure and reactivity?
Complete the following statement by selecting the correct alternative from the choices given:
Natural rubber is a : _________
What is the role of Sulphur in the vulcanization of rubber?
Which of the following are example of synthetic rubber?
(i) Polychloroprene
(ii) Polyacrylonitrile
(iii) Buna-N
(iv) cis-polyisoprene
Vulcanisation makes rubber:
(i) more elastic
(ii) soluble in inorganic solvent
(iii) crystalline
(iv) more stiff
Identify the polymer given below:
Match materials given in Column I with the polymers given in Column II.
| Column I | Column II |
| (i) Natural rubber latex | (a) Nylon |
| (ii) Wood laminates | (b) Neoprene |
| (iii) Ropes and fibres | (c) Dacron |
| (iv) Polyester fabric | (d) Melamine formaldehyde resins |
| (v) Synthetic rubber | (e) Urea-formaldehyde resins |
| (vi) Unbreakable crockery | (f) cis-polyisoprene |
Ebonite is:-
Which of the following is correct regarding the drawbacks of raw rubber.
