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CHEMISTRY
Natural rubber is...

Natural rubber is

A

Trains isomer

B

cis isomer

C

contains equal amounts of cis and trans isomers

D

racemic mixture

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The correct Answer is:
C
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Natural rubber has :

Natural rubber on ozonolysis gives

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

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

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.

From ozonolysis experiment on natural rubber we found that

What is natural rubber ? How does it exhibit elastic properties ?

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 and gutta percha are examples of cis-trans isomers. (R) : Cis-trans isomerism arises due to the difference of geometrical arrangement of two different groups on the double bonded carbon atoms.

AAKASH SERIES-POLYMERS-OBJECTIVE EXERCISE - 4
  1. Natural rubber is

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  2. (A) Glyptal is a condensation homo polymer. (R) Glyptal is used to p...

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  3. (A): Molecular mass of polymers is always expressed as an average. (...

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  4. (A): F(2)C=CF(2), is the monomer of teflon. (R): Polytetrafluoroethy...

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  5. (A): The chains of nylon-6, 6 are held by hydrogen bonding forces. (...

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  6. (A) : Natural rubber and gutta percha are examples of cis-trans isomer...

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  7. (A): Styrene is more reactive than propylene towards cationic polymeri...

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  8. (A) Nylon-6 is obtained by polymerization of caprolactam. (R) Nylon-...

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  9. (A) P.V.C is an addition copolymer (R) P.V.C is used to prepare hand...

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  10. (A) Vulcanised rubber is stiff and has little tendency to absorb water...

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  11. (A) Natural rubber is cis polyisoprene. (R) Isoprene is 2-methyl-1,3...

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  12. (A) Thermosetting polymers are cross linked polymers. (R) Thermosett...

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  13. (A) Natural rubber is an elastomer. (R) The intermolecular forces of...

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  14. (A) Bakelite is prepared by copolymerisation of formaldehyde and pheno...

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  15. (A) Cellulose is natural polymer. (R) Cellulose is obtained from pla...

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  16. (A) Cellulose acetate is a semisynthetic polymer. (R) Natural polyme...

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  17. (A) Poly vinyl chloride is a linear polymer. (R) Poly vinyl chloride...

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  18. (A) L.D.P.E is a branched polymer. (R) L.D.P.E is inert tough and fl...

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  19. (A) Bakelite is a cross linked polymer. (R) Bakelite is formed from...

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  20. (A) Benzene does not undergo polymerisation. (R) Benzene loses aroma...

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  21. (A) Ethylene can undergo polymerisation. (R) Ethylene contain a weak...

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