Question

Class 12 Chemistry  MCQ Questions of Polymers with Answers?

Answer 1

MCQ Questions for Class 12 Chemistry with Answers are prepared as per the Latest Exam Pattern. Solving these Class 12 MCQ Questions with Answers and assess their preparation level. These MCQ Questions can be of extreme help as you will be aware of all the concepts.

Polymers are macromolecules formed by joining a large number of small molecules or monomers in a chain. Polymers are considered to be either amorphous or crystalline although they may not be completely one or the other.

Students are advised to practice the Class 12 Chemistry MCQ Questions of Polymers with Answers is available here. These MCQ Questions for Class 12 Polymers with answers for a quick revision of the Chapter and increasing subject knowledge.

Practice MCQ Question for Class 12 Chemistry chapter-wise

1. Bakelite is an example of

(a) elastomer
(b) fibre
(c) thermoplastic
(d) thermosetting

2. The S in buna-S refers to

(a) Sulphur
(b) Styrene
(c) Sodium
(d) Salicylate

3. Glycogen, a naturally occuring polymer stored in animals is a

(a) monosaccharide
(b) disaccharide
(c) trisaccharide
(d) polysaccharide

4. 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

5. Natural rubber is a polymer of

(a) 1, 1-dimethylbufadiene
(b) 2-methyl-1, 3-butadiene
(c) 2-chlorobuta-1, 3-diene
(d) 2-chlorobut-2-ene

6. Heating rubber with sulphur is known as

(a) galvanisation
(b) bessemerisation
(c) vulcanisation
(d) sulphonation

7. Dacron is an example of

(a) polyamides
(b) polypropenes
(c) polyacrylonitrile
(d) polyesters

8. Which of the following is a condensation polymer?

(a) Teflon
(b) PVC
(c) Polyester
(d) Neoprene

9. Which of the following polymers does not involve cross-linkages?

(a) Vulcanised rubber
(b) Bakelite
(c) Melamine
(d) Teflon

10. Synthetic polymer prepared by using caprolactam is known as

(a) terylene
(b) teflon
(c) nylon 6
(d) neoprene

11. On the basis of mode of formation, polymers can be classified?

(a) as addition polymers only
(b) as condensation polymers only
(c) as copolymers
(d) both as addition and condensation polymers

12. Three -dimensional molecular structure with cross links are formed in the case of a

(a) thermoplastic
(b) thermosetting plastic
(c) Both (a) and (b)
(d) None of the above

13. Which of the following catalyst is used in preparation of high density polyethylene?

(a) Peroxide catalyst
(b) Ziegler - Natta catalyst
(c) Wilkinson’s catalyst
(d) Pd - catalyst

14. Interparticle forces present in nylon-66 are

(a) van der waal’s
(b) hydrogen bonding
(c) dipole-dipole interactions
(d) None of these

15. The plastic household crockery is prepared by using

(a) melamine and tetrafluoroethane
(b) malonic acid and hexamethyleneamine
(c) melamine and vinyl acetate
(d) melamine and formaldehyde

16. Which of the following natural products is not a polymer?

(a) DNA
(b) Cellulose
(c) PVC
(d) Urease

17. Rayon is :

(a) synthetic plastic
(b) natural rubber
(c) natural silk
(d) artificial silk

18. Natural silk is a

(a) polyester
(b) polyamide
(c) polyacid
(d) polysaccharide

19.  Of the following which one is classified as polyester polymer?

(a) Terylene
(b) Bakelite
(c) Melamine
(d) Nylon-66

20. Vulcanisation makes rubber

(a) more elastic
(b) soluble in inorganic solvent
(c) crystalline
(d) none of these

21. Which of these is not a monomer for a high molecular mass silicone polymer?

(a) MeSiCl
(b) Me₂SiCl₂
(c) Me₃SiCl
(d) PhSiCl₃

22. PMMA is the polymer of.

(a) methylmethacrylate
(b) methylacrylate
(c) methacrylate
(d) ethylacrylate

23. The abbreviation PDI refers to:

(a) name of the polymer
(b) polydispersity index of polymer
(c) application of polymer
(d) poly diagonal index

24. The starting materials of PCTFE are:

(a) monochloro trifluoro ethylene
(b) tetrafluoroethylene
(c) vinyl chloride
(d) styrene

25. Which one is protein fibre?

(a) Cotton
(b) Rayon
(c) Silk
(d) Polyester

Answer 2

1. Answer : (d) thermosetting

Explanation: Bakelite is a polymer made up of the monomers phenol and formaldehyde. This phenol-formaldehyde resin is a thermosetting polymer. Bakelite is the commercial name for the polymer obtained by the polymerization of phenol and formaldehyde.

2. Answer : (b) Styrene

Explanation: In Buna-S, Bu stands for butadiene, Na stands for sodium and S stands for styrene i.e. Buna-S is the copolymer of buta 1, 3- diene and styrene in the ratio of 3:1 in the general presence of sodium.

3. Answer : (d) polysaccharide

Explanation: Glycogen is a homo-polymer which consists of glucose units only. It consists of glucose monomers linked by glycosidic linkages in a helical fashion. This makes glycogen a highly branched polysaccharide .

4. Answer : (b) adipic acid and hexamethylenediamine

Explanation: Nylon 66 is produced by the condensation reaction of hexamethylenediamine and adipic acid. The two comonomers are first reacted to form a salt.

5. Answer : (b) 2-methyl-1, 3-butadiene

Explanation: Rubber is an example of an elastomer type polymer, where the polymer has the ability to return to its original shape after being stretched or deformed. The rubber polymer is coiled when in the resting state. Natural rubber is from the monomer isoprene (2-methyl-1,3-butadiene).

6. Answer : (c) vulcanisation

Explanation: Vulcanization is a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. The process involves the formation of cross-links between long rubber molecules so as to achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.

7. Answer : (d) polyesters

Explanation: Dacron (Terylene) is an example of polysters formed by the condensation of ethylene glycol and terephthalic acid.

8. Answer : (c) Polyester

Explanation: Polyester is a condensation polymer; It is a synthetic fabric that's usually derived from petroleum.

9. Answer : (d) Teflon

Explanation: Teflon is an addition linear polymer of tetrafluoroethylene.

10. Answer : (c) nylon 6

Explanation:

 

11. ​Answer : (d) both as addition and condensation polymers

Explanation: On the basis of mode of their formation, polymers are classified as addition polymers and condensation polymers.

12. ​Answer : (b) thermosetting plastic

Explanation: Thermosetting plastic consists of chain of the molecules which are cross-linked, with each other when heated. When thermosetting plastics cross-link, the molecules create a permanant, network which is a 3− D structure and can be considered one giant molecule.

13. ​Answer : (b) Ziegler - Natta catalyst

Explanation: Ziegler-Natta catalyst is a mixture of two compounds named as triethyl aluminium and titanium tetrachloride. This catalyst is used in the preparation of high density polyethylene and polythenes.

14. Answer : (b) hydrogen bonding

Explanation: Nylon-6,6 contains hydrogen bonding interactions due to the presence of amide linkages. The long molecular chains in the structure of Nylons results in making more hydrogen bonds which hold the molecule and provide strength to it.

15. ​Answer : (d) melamine and formaldehyde 

Explanation: The unbreakable plastic household crockery is made from copolymer of melamine and formaldehyde (HCHO).

16. ​Answer : (c) PVC

Explanation: PVC stands for polyvinyl chloride. It is made by the polymerization reaction of monomer vinyl chloride. It is the third most widely produced synthetic fiber.

17. Answer : (d) artificial silk

Explanation: Rayon is called artificial silk because it is produced from naturally occurring polymers and looks like silk. It is woven like silk fibers but is man-made, unlike silk.

18. ​Answer : (b) polyamide

Explanation: Natural silk is composed of mainly fibroin. It is a type of insoluble protein. It has a sequence of amino acids. Thus, silk is a type of polyamide.

19. ​Answer : (a) Terylene

Explanation: Terylene is a polyester polymer because it is formed by the monomer units terephthalic acid and ethylene glycol.

20. ​Answer : (a) more elastic

Explanation: Vulcanization is a chemical reaction between rubber and a functional group, usually brought about by heat. The result is a product that is stronger, more elastic, more resilient, and less sensitive to temperature changes and the action of solvents than the original polymer.

21. ​Answer : (c) Me₃SiCl

Explanation: Me₃SiCl is not a monomer for a high molecular mass silicone polymer because it generates Me₃SiOH when subjected to hydrolysis which contains only one reacting site. Hence, the polymerization reaction stops just after first step.

22. ​Answer : (a) methylmethacrylate

Explanation: Polymethyl methacrylate (PMMA), a synthetic resin produced from the polymerization of methyl methacrylate. A transparent and rigid plastic, PMMA is often used as a substitute for glass in products such as shatterproof windows, skylights, illuminated signs, and aircraft canopies.

23. Answer : (b) polydispersity index of polymer

Explanation: The polydispersity index (PDI) is a measure of the distribution of molecular mass in a given polymer sample. The PDI calculated is the weight average molecular weight divided by the number average molecular weight. It indicates the distribution of individual molecular masses in a batch of polymers.

24. ​Answer : (a) monochloro trifluoro ethylene

Explanation: The starting material of PCTFE is mono chlorotrifluoroethylene. PCTFE is an additional homopolymer. It's prepared by the free-radical polymerization of chlorotrifluoroethylene (CTFE) and might be applied by solution, bulk, suspension and emulsion polymerization.

25. ​Answer : (c) Silk

Explanation: Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons.

Click here to practice  MCQ Question for Polymers Class 12