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Novolac on heating with formaldehyde und...

Novolac on heating with formaldehyde undergoes ___________ to form an infusible solid mass called ____________ .

A

polymerisation , melamine

B

vulcanisation , resin

C

cross-linking, bakelite

D

condensation, polystyrene

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The correct Answer is:
C
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NCERT FINGERTIPS-POLYMERS -Types Of Polymerisation Reaction
  1. Which of the following polymers does not involve cross-linkages ?

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  2. Which among the following is a cross-linked polymer ?

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  3. Novolac on heating with formaldehyde undergoes to form an infusible s...

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  4. Identify X and Y in the given polymerization reactions .

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  5. Natural rubber is a polymer of

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  6. Which of the following is not an example of rubber ?

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  7. Match the polymers given in column I with monomers incolumn II and ma...

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  8. Why does cis-polyisoprene exhibit elasticity ?

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  9. Heating rubber with sulphur is known as

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  10. In vulcanization of rubber:

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  11. Match the column I with column II and mark the appropriate choice.

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  12. Which of the following represents chloroprene , the monmer of neoprene...

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  13. Match the column I with column II and mark the appropriate choice .

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  14. Which one of the following statements is wrong ?

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  15. Buna-N is used in making oil seals and tank linings, etc. because

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  16. Which of the following is not ture about polymers ?

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  17. Synthetic biopolymer , PHBV is made up to the following monomers ,

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  18. Which of the following is a biodegradable synthetic polymer ?

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  19. The monomers of biodegradable polymer , nylon 2-nylon 6 are

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  20. Choose the correct statements from the following .

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