CBSE Questions for Class 12 Engineering Chemistry Polymers Quiz 2 - MCQExams.com

The number of $$\pi-$$bonds present in the monomer of polyacrylonitrile is:
  • $$2$$
  • $$1$$
  • $$3$$
  • $$4$$
Which of the following is the IUPAC name of the aromatic monomer is present in melmac?
  • $$2,\: 4,\: 6$$ -Triamino - $$1,\: 3,\: 5$$ - triazine
  • Methanal
  • $$1,\: 3,\: 5$$ - Triamine - $$2,\: 4,\: 6$$ - triazine
  • Melamine
The formation of polyethylene from calcium carbide takes places as follows :
$$CaC_2 + 2H_2O \rightarrow Ca(OH)_2+C_2H_2$$
$$C_2H_2+H_2\rightarrow C_2H_4$$
$$nC_2H_4\rightarrow (CH_2-CH_2)_n$$
The amount of polyethylene obtained from $$64$$ kg of $$CaC_2$$ is :
  • $$14$$ kg
  • $$7$$ kg
  • $$21$$ kg
  • $$28$$ kg
Which of the following is not correctly matched?
Statement 1: Polybutadiene is an example of step growth polymer.
Statement 2: Copolymerisation of butadiene and acrylonitrile gives Buna-N.
  • Statement 1 and statement 2 is true and statement 2 is the correct explanation of statement 1
  • Statement 1 and statement 2 is true but statement 2 is not the correct explanation of statement 1
  • Statement 1 is true and statement 2 is false
  • Statement 1 is false and statement 2 is true
Which of the following sets contains only co-polymers ?
  • PVC, Neoprene
  • Polythene, Polyester
  • Nylon-6, Teflon
  • Melmac, Bakelite
Which of the following is the biodegradable polymer of polyamide class ?
  • Nylon - $$6,\: 6$$
  • Nylon - $$2$$ - nylon - $$6$$
  • Dextran
  • PHBV
The PDI (polydisersity index) is the ratio of weight to number-average molecular masses, $$M \bar{w} / M \bar{n}$$. In natural polymers, which are generally monodispersed, PDI is ............. and in synthetic polymers which are always polydispersed, PDI is ............. because $$M \bar {w}$$ is always ............. than $$M \bar {n}$$. Fill in the blanks. 
  • greater than $$1$$, $$1$$, higher
  • $$1$$, greater than $$1$$, higher
  • less than $$1$$, $$1$$, lower
  • $$1$$, less than $$1$$, lower
Statement 1: Teflon has high thermal stability and chemical inertness.

Statement 2: It has strong C-F bonds.

Choose the correct option:
  • Statement 1 is true: Statement 2 is true; statement 2 is the correct explanation of statement 1
  • Statement 1 is true: statement 2 is true; statement 2 is not the correct explanation of statement 1
  • Statement 1 is true; statement 2 is false
  • Statement 1 is false; statement 2 is true
Which of the following is a step-growth polymer ?
  • Polyacrylonitrile
  • Polyisoprene
  • Nylon
  • Polythene
Which of the following are condensation copolymers ?
  • Nylon - $$6$$
  • Nylon - $$6, \:6$$
  • Dacron
  • Glyptal
The monomeric repeating units of nylon - $$6$$ is:
  • caprolactam
  • phenol and formaldehyde
  • tetrafluoroethylene
  • butadiene
Which one of these is a monomer of Bakelite?
  • Vinyl acetate
  • Tetrafluoroethylene
  • Formaldehyde
  • Propylene
The polymer that can be classified as polyester polymer is: 
  • Bakelite
  • Melamine
  • Nylon-6, 6
  • Terylene
Which of the following processes can be used to prepare polystyrene ?
  • Anionic
  • Cationic
  • Free radicals
  • Ziegler-Natta
What is the monomer unit for teflon?
Which of the following are made of polyamides ?
  • Wool
  • Natural silk
  • Rayon
  • Nylon
Which of the following are biopolymers ?
  • Nucleic acids
  • Leather
  • Baklite
  • Orlon
Which material is used for vulcanisation of rubber?
  • Iron
  • Sulphur
  • Chlorine
  • Calcium Carbonate
The chemical name of melamine is_________.
  • $$2,4$$-Diamino-1$$,3,5$$-triazine
  • $$2$$-Amino-$$1,3,5$$-triazine
  • $$2,4,6$$-Triamino-$$1,3,5$$-triazine
  • $$1,3,5$$-Triamino-$$2,4,6$$-triazine
Which of the following is not a condensation polymer ?
  • Nylon - $$6,\: 6$$
  • PTFE
  • Dacron
  • Glyptal
Which one of the following polymer is prepared by condensation polymerization?
  • Polystyrene
  • Nylon - $$6,\:6$$
  • Teflon
  • Rubber
The product that you would expect to obtain from catalytic hydrogenation of natural rubber is_________.
  • syndiotactic
  • atactic
  • isotactic
  • either atatic or isotatic
Bakelite is ___.
  • rubber
  • rayon
  • brittle plastic
  • plasticisers
Silk worm : Cocoon :: Wool: ?
  • Hair of rabbit
  • Cotton plant
  • Fleece of sheep
  • Jute of hemp
The plastic product which can be remoulded is
  • bakelite
  • melamine
  • polyethene
  • polycot
Teflon is :
  • a natural fibre
  • a synthetic fibre
  • a polymer
  • a cellulose
Which of the following is/are not a condensation copolymer?
  • Nylon-$$6$$
  • Nylon-$$6,6$$
  • Dacron
  • PVC
$$\begin{bmatrix}-CH_2-\underset{\underset{\textstyle\;OH}{\displaystyle\mid}}{\;\;\;CH}-CH_2-\underset{\underset{\textstyle\;OH}{\displaystyle\mid}}{\;\;\;CH}-CH_2-\underset{\underset{\textstyle\;OH}{\displaystyle\mid}}{\;\;\;CH}-\end{bmatrix}_n$$

Polyvinyl alcohol (as shown above) is a unique polymer having high affinity for water. Which of the following procedures would be most suitable for its preparation?
  • radical chain polymerisation of $$CH_2=CH-CH_2-OH$$
  • radical chain polymerisation of $$CH_2=CH-OH$$
  • radical chain polymerisation of $$CH_2=CH-CO_2CH_3$$, following by base catalysed hydrolysis
  • radical chain polymerisation of $$CH_2=CH-OCOCH_3$$, followed by acid catalysed hydrolysis
  • radical chain polymerisation of $$CH_2=CH-OCOCH_3$$, followed by base catalysed hydrolysis
The repeating unit present in nylon $$-6$$ is:
  • $$-[NH(CH_{2})_{6}NHCO(CH_{2})_{4}CO]-$$
  • $$-[CO(CH_{2})_{5}NH]-$$
  • $$-[CO(CH_{2})_{6}NH]-$$
  • $$-[CO(CH_{2})_{4}NH]-$$
  • $$-[NH(CH_{2})_{4}NHCO(CH_{2})_{6}CO]-$$
The monomers used in preparation of dextron are:
  • lactic acid and glycolic acid
  • 3-hydroxy butanoic acid and 3-hydroxy pentanoic acid
  • styrene and 1, 3-butadiene
  • hexamethylenediamine and adipic acid
Tubeless tyres are co-polymers of isoprene and :
  • neoprene
  • silicons
  • isobutylene
  • PAN
Which one of the following statement is not true?
  • Natural rubber has trans configuration at every double bond
  • BUNA-S is copolymer of butadiene and styrene
  • Natural rubber is 1,4 polymer of isoprene
  • In vulcanization, the formation of sulphur bridges between different chains makes rubber harder and stronger
Under high pressure and in presence of nickel cyanide catalyst, acetylene on polymerisation gives:
  • Benzene
  • Mesitylene
  • Cyclo-octatetraene
  • Vinyl acetylene
Which of the following is/are true for teflon?
  • It is yellow, dense, amorphous, extremely chemically reactive compound.
  • It is good electrical conductor.
  • It has self lubricating property.
  • It is used in manufacturing artificial hip joints used for the patients with arthritis.
When 280 gm of ethylene polymerises to polyethene according to the equation. 

$$nCH_2=CH_2 \longrightarrow -(CH_2-CH_2)_n-$$

The weight and mole of polyethylene formed will be:
  • 280, 10n
  • $$\displaystyle \frac{280}{n}$$, n
  • $$\displaystyle \frac{280}{n}$$, 280
  • 280, $$\displaystyle \frac{10}{n}$$
Teflon is an example of polymer which is a/an:
  • polyamide
  • addition polymer
  • polyester
  • formaldehyde resin
Which among the following is not a natural polymer?
  • Wool
  • Silk
  • Rubber
  • PVC
During long distance travel you would like to take drinking water in a bottle made up of :
  • glass
  • plastic
  • leather
  • steel
PP (Polypropylene) is used for making _____________.
  • disposable cups
  • liquid detergents
  • grocery bags
  • electric switches
Which of the following are polyesters?
Cotton, Terylene, Nylon, PET, Rayon, Acrylic.
  • Cotton, Nylon, Rayon
  • Acrylic, PET, Cotton
  • Terylene, PET, Acrylic
  • PET, Nylon, Rayon
The polymer, which is the constituent of cotton is:
  • cellulose
  • ester
  • rayon
  • nylon
Rubber is heated with sulphur and the process is known as:
  • Galvanization
  • Vulcanization
  • Bessemerization
  • Sulphonation
The monomer of Buna-S are:
  • styrene and butadiene
  • isoprene and butadiene
  • vinyl chloride and Sulphur
  • butadiene.
When formaldehyde is heated with phenol in the presence of an alkali, the product formed is:
  • rubber
  • bakelite
  • chloroprene
  • neoprene
The polymer formed by condensation of adipic acid and hexamethylene diamine is:
  • Isoprene
  • Rayon
  • Terylene
  • Nylon-$$6, 6$$
Bakelite is obtained from phenol by reaction with : $$1$$
  • Acetaldehyde
  • Acetal
  • Formaldehyde
  • Chlorobenzene
What is Modacrylic?
  • Modified acrylic
  • Natural fibre acrylic
  • Acrylic and polyester
  • None of above
The monomer of Natural Rubber is:
  • $$\begin{matrix}CH_2 &=&C&-&CH&=&CH_2 \\&&|&\\&&\, \, \,\, \, \, \,\,CH_3\end{matrix}$$
  • $$\begin{matrix}&&\, \, \,\,Cl\\&&|&\\CH_2 &=&C&-&CH&=&CH_2 \end{matrix}$$
  • $$CH_2=CH - CH = CH_2$$
  • None of these
Which of the following is an addition polymer ?
  • Neoprene
  • Teflon
  • Polyvinylchloride
  • All of the above
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