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Natural rubber has:...

Natural rubber has:

A

all cis-configuration

B

all trans-configuration

C

alternate cis-and trans-configuration

D

random cis-and trans-configuration

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The correct Answer is:
A
all cis-configuration
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Rubber is a naturally occurring polymer, which is a linear polymer of isoprene. It can be easily deformed but regains its original shape after the stress is relieved. The properties of natural rubber can be modified and improved by process of vulcanization. It is mixed with 3 to 5% sulphur and heated at 373-423 K. This forms cross links through disulphide bonds (-S-S-) , which make rubber hard, tough with greater tensile strength. There are many different formulations of synthetic rubbers. These are copolymers in which one of the monomer is isoprene. Some common examples are neoprene rubber, Buna-S, Buna-N, etc. Does natural rubber has cis- or trans-configuration about the double bonds?

Natural rubber is:

The following is used for making natural rubber hard:

Natural rubber is

Natural rubber is

The polymer of natural rubber is:

DISHA PUBLICATION-POLYMERS -EXERCISE -2 : CONCEPT APPLICATOR
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  2. In which of the following polymers , empirical formula resembles with ...

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  3. Which is a polymer of three different monomers?

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  4. The polymer which has conducting power is

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  5. Orlon is a -

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  6. Which of the following is not correct regarding terylene?

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  7. Vinyl chloride can be converted into PVC.in this reaction the catalyst...

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  8. The number average molecular mass and mass average molecular mass of a...

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  9. The monomeric units of terylene are glycol and which of the following

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  10. Given th polymers, A = Nylon-6,6, B= Buna-S, C = Polythene Arrange...

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  11. Which one of the following statements is not true ?

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  12. The compound which cannot be used as a plasticizer, is

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  13. When condensation product of hexamethylenediamine and adipic acid is h...

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  14. Of the following which one is classified as polyester polymer?

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  15. Which one of the following is not a condensation polymer?

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  16. Which of the following statements is false?

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  17. Which of the following organic compounds polymerize to form the polyes...

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  18. Biodegradable polymer which can be produced from glycine and aminocapr...

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  19. Caprolactam, is used for the manufacture of

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  20. Natural rubber has:

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