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(A) Thermosetting polymers are cross lin...

(A) Thermosetting polymers are cross linked polymers.
(R) Thermosetting polymers cannot be reused.

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:
B
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AAKASH SERIES-POLYMERS-OBJECTIVE EXERCISE - 4
  1. (A) Vulcanised rubber is stiff and has little tendency to absorb water...

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

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

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

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

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

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

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

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

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

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

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

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  13. (A) P.V.C is a homopolymer. (R) P.V.C is obtained by the polymerizat...

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  14. (A) Nylon 6,6 is a condensation co-polymer. (R) To prepare nylon-6, ...

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  15. (A) Nylon-6 is a condensation polymer. (R)Nylon-6 is obtained from c...

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  16. (A) Buna-N is an elastomer. (R) Buna-N is rubber like solid with ela...

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

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

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

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

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