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प्रश्न
How does the presence of double bonds in rubber molecules influence their structure and reactivity?
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उत्तर
Natural rubber is a linear cis-polyisoprene in which the double bonds are present between C2 and C3 of the isoprene units
Because of this cis-configuration, intermolecular interactions between the various strands of isoprene are quite weak. As a result, various strands in natural rubber are arranged randomly. Hence, it shows elasticity.
संबंधित प्रश्न
What is natural rubber?
(A) Cis-1,4-polyisoprene
(B) Neoprene
(C) Trans-1,4-polyisoprene
(D) Butyl rubber
Write names and chemical formulae of monomers used in preparing Buna-S.
Discuss the main purpose of vulcanisation of rubber.
Identify the monomer in the following polymeric structures.
Write the formulae of the raw materials used for preparation of 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?
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 |
Which one of the following monomers gives the polymer neoprene on polymerization?
The polymer of natural rubber is:-
Which of the following statement is CORRECT regarding the drawbacks of raw rubber?
In vulcanization of rubber:
