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The vulcanized rubber has...

The vulcanized rubber has  

A

high water absorbing tendency

B

low elasticity

C

high sensitivity to heat treatment

D

high resistance to chemical oxidation

Text Solution

Verified by Experts

The correct Answer is:
D
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(A) : The vulcanised rubber has greater elasticity and tensile strength than crude rubber (R) : Sulphur cross-links are developed

Natural rubber or raw rubber consists of basic material latex which is a dispersion of isoprene. Natural rubber can treatment this isoprene polymers to form a high molecular weight polymer of isoprene. Natural rubber can be obtained from five hundred different species of plants. (i) Tensile strength of vulcanized rubber is almost ten times more than raw rubber. (ii) Elasticity of raw rubber is very high.

Vulcanised rubber resists

The number of polymers havng stronger intermolecular forces of attraction than Bakelite among the following is (i) PTFE (ii) HDPE (iii) LDPE (iv) PVC (v) Dacron (vi) Rayon (vii) Vulcanized rubber (viii) Nylon -66

(A) Vulcanised rubber is stiff and has little tendency to absorb water. (R) Vulcanisation introduces sulphur bridges between polymer chains.

(A) The process of vulcanization can be accelerated by Zno or zinc acetate. (R) Vulcanised Rubber is used in tyre industry.

During the vulcanization of rubber, sulphur cross linking occurs at a) Double bonds b) Allylic - CH_(2) - groups c)Methyl groups The correct answer is

Natural rubber has :

What is vulcanization of rubber ?

Explain the purpose if vulcanization of rubber .