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Natural rubber or raw rubber consists of...

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.

A

(i) is true (ii) is false

B

(i) is false (ii) is true

C

Both (i) & (ii) are true

D

both (i) & (ii) are false

Text Solution

Verified by Experts

The correct Answer is:
C
(i) Tensile strength of vulcanized rubber is almost ten times more than raw rubber.
(ii) Elasticity of raw rubber is very high.
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If a natural rubber has a molecular weight of 20,400 then the no. of repeating units in the polymer is x xx 10^(y).(x+y) is equal to

(A) : Natural rubber is a polymer of cis-isoprene (R) : Poly trans isoprene is called Gutta-percha

Knowledge Check

  • 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. The molecular weight of the raw rubber is about

    A
    1,00,000 - 1,50,000
    B
    5,000-10,000
    C
    2,00,000 - 5,00,000
    D
    50,000 - 1,00,000

  • 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. In the isoprene polymer all the isoprenes have

    A
    Trans 1,4 condiguration
    B
    Cis 1,4 configuration
    C
    Both cis & trans 1,4 configuration
    D
    Cis 1,2 configuration

  • (A) Vulcanised Rubber suits industry than natural Rubber. (R) Elastic properties of Rubber can be reduced due to vulcanization.

    A
    Both (A) and (R) are true and (R) is the correct explanation of (A)
    B
    Both (A) and (R) are true and (R) is not the correct explanation of (A)
    C
    (A) is true but (R) is false
    D
    Both (A) and (R) are false
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