15. POLYMERS Objective

15. POLYMERS

1. Bakelite is an example of –

(A) elastomer
(B) fibre
(c) thermoplastic
(D) thermosetting

2. Arrange the following polymers is an increasin order of intermolecular forces; fibre, plastic, elastomer-

(A) Elastomer < Fibre < plastic
(B) Elastomer < Plastic < Fibre
(C) Plastic < Elastomer < Fibre
(D) Fibre < Elastomer < Plastic

3. The correct structure of monomers of buna-S is

Ans. (C)

4. The S in buna-S refers to

(A) Sulphur
(B) Styrene
(C) Sodium
(D) Salicylate

5. Identify the type of polymer

(i) – A – A – A – A – A – A –
(ii) – A – B – B – A – A – A – B – A –

(A) (i) Homopolymer, (ii) Copolymer
(B) (i) Natural polymer, (ii) Synthetic polymer
(C) (i) Linear polymer, (ii) Branched polymer
(D) (i) Fibre, (ii) Elastomer

6. Which of the following are thermoplastic polymers ?

(A) Polythene, urea-formaldehyde, polyvinyls
(B) Bakelite, polythene, polystyrene
(C) Polythene, polystyrene, polyvinyls
(D) Urea-formaldehyde, polystyrene, bakelite

7. Nylon 6, 6 is obtained by condensation polymerisation of

(A) adipic acid and ethylene glycol
(B) adipic acid and hexamethylenediamine
(C) terephthalic acid and ethylene glycol
(D) adipic acid and phenol

8. Natural rubber is a polymer of

(A) 1, 1-dimethylbutadiene
(B) 2-methyl-1, 3-butadiene
(C) 2-chlorobuta-1, 3-diene
(D) 2-chlorobut-2-ene

9. Dacron is an example of

(A) polyamides
(B) polypropenes
(C) polyacrylnitrile
(D) polyesters

10. Composition of Ziegler-Natta catalyst is

(A) (Et₃)₃Al.Ticl₂
(B) (Me)₃Al.TiCl₂
(C) (Et)₃Al.TiCl₄
(D) (Et)₃Al.PtCl₄

11. Which of the following is a homopolymer ?

(A) Bakelite
(B) Nylon 6,6
(C) Neoprene
(D) Buna-S

12. Polymer which has amide linkage is

(A) nylon-6, 6
(B) terylene
(C) teflon
(D) bakelite

13. In vuclanization of rubber

(A) sulphur reacts to form a new compound
(B) sulphur cross-links are introduced
(C) sulphur forms a very thin protective layer over rubber
(D) All statements are correct

14. 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

15. Synthetic biopolymer, PHBV is made up of the following monomers

(A) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid
(B) 2-hydroxybutanoic acid + 2-hydroxypentanoic acid
(C) 3-chlorobutanoic acid + 3-chloropentanoic acid
(D) 2-chlorobutanoic acid + 3-methylpentanoic acid

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

(A) Aliphatic polyesters
(B) PHBV
(C) Nylon-2-nylon-6
(D) All of these

17. Which of the following polymers of glycose is stored by animals ?

(A) Cellulose
(B) Amylose
(C) Amylopectin
(D) Glycogen

18. The commercial name of polyacrylonitrile is

(A) dacron
(B) orlon (acrilan)
(C) PVC
(D) bakelite

19. Which of the following polymers are used as fibre ?

(A) Nylon
(B) Polytetrafluoroethane
(C) Terylene
(D) Buna-S

20. Sweetest of all sugars is

(A) Glucose
(B) Lactose
(C) Sucrose
(D) Fructose

21. Glucose is

(A) Triose
(B) Tetrose
(C) Fentose
(D) Hexose

22. Which vitamin deficiency causes night blindness ?

(A) Vitamin A
(B) Vitamin B
(C) Vitamin C
(D) Vitamin D

Class 12th Chemistry Objective Question English