15. POLYMERS
1. Bakelite is an example of –
(A) elastomer
(B) fibre
(c) thermoplastic
(D) thermosetting
Answer ⇒ (D)
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
Answer ⇒ (B)
3. The correct structure of monomers of buna-S is
Ans. (C)
Answer ⇒ (C)
4. The S in buna-S refers to
(A) Sulphur
(B) Styrene
(C) Sodium
(D) Salicylate
Answer ⇒ (B)
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
Answer ⇒ (A)
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
Answer ⇒ (C)
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
Answer ⇒ (B)
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
Answer ⇒ (B)
9. Dacron is an example of
(A) polyamides
(B) polypropenes
(C) polyacrylnitrile
(D) polyesters
Answer ⇒ (D)
10. Composition of Ziegler-Natta catalyst is
(A) (Et3)3Al.Ticl2
(B) (Me)3Al.TiCl2
(C) (Et)3Al.TiCl4
(D) (Et)3Al.PtCl4
Answer ⇒ (C)
11. Which of the following is a homopolymer ?
(A) Bakelite
(B) Nylon 6,6
(C) Neoprene
(D) Buna-S
Answer ⇒ (C)
12. Polymer which has amide linkage is
(A) nylon-6, 6
(B) terylene
(C) teflon
(D) bakelite
Answer ⇒ (A)
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
Answer ⇒ (B)
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
Answer ⇒ (C)
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
Answer ⇒ (A)
16. Which of the following is a biodegradable synthetic polymer ?
(A) Aliphatic polyesters
(B) PHBV
(C) Nylon-2-nylon-6
(D) All of these
Answer ⇒ (D)
17. Which of the following polymers of glycose is stored by animals ?
(A) Cellulose
(B) Amylose
(C) Amylopectin
(D) Glycogen
Answer ⇒ (D)
18. The commercial name of polyacrylonitrile is
(A) dacron
(B) orlon (acrilan)
(C) PVC
(D) bakelite
Answer ⇒ (B)
19. Which of the following polymers are used as fibre ?
(A) Nylon
(B) Polytetrafluoroethane
(C) Terylene
(D) Buna-S
Answer ⇒ (A)
20. Sweetest of all sugars is
(A) Glucose
(B) Lactose
(C) Sucrose
(D) Fructose
Answer ⇒ (C)
21. Glucose is
(A) Triose
(B) Tetrose
(C) Fentose
(D) Hexose
Answer ⇒ (D)
22. Which vitamin deficiency causes night blindness ?
(A) Vitamin A
(B) Vitamin B
(C) Vitamin C
(D) Vitamin D
Answer ⇒ (A)