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(A) Poly styrene is a Thermoplastic poly...

(A) Poly styrene is a Thermoplastic polymer.
(R) Polystyrene softens on heating and hardens on cooling.

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

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-POLYMERS-OBJECTIVE EXERCISE - 4
  1. (A) Buna-N is an elastomer. (R) Buna-N is rubber like solid with ela...

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  2. (A) Nylon-6, 6 is a fibre. (R) Intermolecular attraction in Nylon 6,...

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  3. (A) Poly styrene is a Thermoplastic polymer. (R) Polystyrene softens...

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  4. (A) Bakelite is a Thermoplastic polymer. (R) Bakelite is a linear po...

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  5. (A) Urea formaldehyde resin can be reused again even on strong heating...

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  6. (A) Addition polymerisation is also known as step growth polymerisatio...

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  7. (A) Poly lactic acid is a condensation copolymer. (R) Poly lactic ac...

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  8. (A) AICI(3) can initiate cationic polymerisation. (R) AICI(2) can pr...

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  9. (A) In Anionic polymerization chain terminating step is absent. (R) ...

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  10. (A) Benzoyl peroxide can initiate free radical polymerisation. (R) ...

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  11. (A) Ethylene can not be prepared by anionic polymerisation. (R) Eth...

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  12. (A) Teflon is used in nonstick cookwere (R) Teflon is resistant to a...

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  13. (A) Condensation polymeristion is called step growth polymerisation. ...

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  14. (A) Nylon-6 is condensation homo polymer. (R) Nylon-6 is a fibre.

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  15. (A) Dacron is used as reinforcing material in safety helmets. (R) Da...

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  16. (A) Novolac is a linear polymer. (R) Bakelite is obtained from novol...

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  17. (A) Melamine is a thermosetting polymer (R) Melamine is a condensati...

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  18. (A) Melamine polymers are used to prepare unbreakable crockery items. ...

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  19. (A) Vulcanised Rubber suits industry than natural Rubber. (R) Elasti...

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  20. (A) Rubber latex is colloidal dispersion in water with negatively char...

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