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प्रश्न
Vulcanisation makes rubber:
(i) more elastic
(ii) soluble in inorganic solvent
(iii) crystalline
(iv) more stiff
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उत्तर
(i) more elastic
(iv) more stiff
Explanation:
Vulcanisation makes rubber more elastic and stiff. On vulcanization sulphur forms cross-links at the reactive sites of double bonds or at their reactive allylic position and thus rubber gets stiffened.
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संबंधित प्रश्न
Write names and chemical formulae of monomers used in preparing Buna-S.
What is the role of sulphur in the vulcanisation of rubber?
How does the presence of double bonds in rubber molecules influence their structure and reactivity?
Discuss the main purpose of vulcanisation of rubber.
Identify the monomer in the following polymeric structures.
Write names and chemical formulae of monomers used in preparing Buna-N.
Write the formulae of the raw materials used for preparation of Buna-S
Write the structure of the monomer used in the following polymer:
Buna-S
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?
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 |
Which one of the following monomers gives the polymer neoprene on polymerization?
Which of the following is correct regarding the drawbacks of raw rubber.
Which of the following statement is CORRECT regarding the drawbacks of raw rubber?
Match List I with List II.
| List I | List II |
| (Monomer Unit) | (Polymer) |
| (a) Caprolactum | (i) Natural rubber |
| (b) 2-Chloro-1, 3-butadiene | (ii) Buna-N |
| (c) Isoprene | (iii) Nylon-6 |
| (d) Acrylonitrile | (iv) Neoprene |
Choose the correct answer from the options given below:
