CBSE Questions for Class 12 Engineering Chemistry Polymers Quiz 13 - MCQExams.com

The most suitable property for molecular weight determination of polymers is:
  • osmotic pressure
  • lowering of vapour pressure
  • elevation in boiling point
  • depression in freezing point
Buna-N synthetic rubber is a copolymer of 
  • $${ H }_{ 2 }C=CH-CH={ CH }_{ 2 }$$ and $$NC-CH={ CH }_{ 2 }$$
  • $${ H }_{ 2 }C=CH-CN$$ and $${ H }_{ 5 }{ C }_{6}-CH-CH={ CH }_{ 2 } $$
Buna-N and Buna-S are the types of
  • Natural rubber
  • Synthetic rubber
  • Buna-N is natural rubber while Buna-S is synthetic rubber
  • None of these
This step basically illustrates the:
1135548_df3151edb40a4ba2982a56589b08ac22.png
  • chain initiation
  • chain propagation
  • chain termination
  • All of these
Match the following 
     polymer                                                 Catalyst     
A) Low density polythene                    1) $${\text{FeS}}{{\text{O}}_{\text{4}}}{\text{ + }}{{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}$$     
B) Polypropylene                                   2)$${\left( {{\text{N}}{{\text{H}}_{\text{4}}}} \right)_{\text{2}}}{{\text{S}}_{\text{2}}}{{\text{O}}_{\text{8}}}$$ 
C) Teflon                                                3) $${\left( {{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}} \right)_{\text{3}}}{\text{Al}}$$
D) Orlon                                                 4)Trace of oxygen     
  • A-4 , B-3, C-2, D-1
  • A-4, B-3, C-1, D-2
  • A-3, B-4, C-2, D-1
  • A-3, B-4, C-1, D-2
Chemical reactions could have converted simple organic compounds into _________ for origin of life:
  • Macromolecules
  • Cells
  • Nitrogen
  • Micromolecules
Which of the following polymers consists of practically linear molecules?
  • Low density polythene
  • High density polythene
  • Both (A) and (B)
  • Neither (A) nor (B)
Among the following, the branched chain polymer is:
  • Polyvinyl chloride
  • Bakelite
  • Low density polythene
  • High density polythene
Which is the correct structure of Nylon-6?
Orlon is a polymer of
  • Tertafluoro ethylene
  • Acrylonitrile
  • Ethanoic acid
  • Benzene
Which of the following polymer is used in paints?
  • Gutta percha
  • Melamine
  • Buna-S
  • Novolac
Polymers 'X' and 'Y' respectively are:
1720980_ddb7d555936a49498a9ce3f6a6c47169.PNG
  • nylon-6; nylon-6, 6
  • nylon-6,6; nylon-6
  • nylon-6; nylon-6, 10
  • nylon-6,6; nylon-6, 10
In bakelite, the rings are joined to each other through: 
  • $$ -CH_2- $$
  • $$ -O- $$
A plastic bakelite is a compound of phenol with: 
  • $$ CH_3CHO $$
  • $$ HCHO $$
  • acetal
  • chlorobenzene
Acetoacetic ester is made by the process of:
  • esterification
  • condensation
  • polymerisation
  • isomerisation
A plastic bakelite is obtained from:
  • benzene
  • formaldehyde
  • ammonia
  • phenol
Bakelite is prepared by the reaction between:
  • phenol and formaldehyde
  • urea and formaldehyde
  • ethylene and glycol
  • tetramethylene and glycol
Which of the following structures represents neoprene polymer?
Which of the following statements is not correct?
  • Caprolactam is the monomer of nylon-6
  • Terylene is a polyester polymer
  • Phenol formaldehyde resin is known as bakelite
  • The monomer of natural rubber is butadiene
The monomer of polystyrene is:
  • $$C_2H_5CH=CH_2$$
  • $$CH_2=CHCl$$
  • $$C_6H_5CH=CH_2$$
  • $$CH_2=CHCHO$$
  • $$C_6H_5CH=CHCHO$$
Which of the following is not an example of additional polymer?
  • Terylene
  • Polypropylene
  • Polyethylene
  • Polystyrene
Nylon is not a:
  • Condensation polymer
  • Polyamide
  • Copolymer
  • Homopolymer
Which is a naturally occuring polymer?
  • Polythene
  • PVC
  • Acetic acid
  • Protein
Bakelite is a polymer of 
  • $$ HCHO $$ + phenol
  • $$ HCHO $$ + aldehyde (acetaldehyde)
  • Phenol + $$ H_2SO_4 $$
  • $$ HCHO $$ + acetone
The mass average molecular mass & number average molecular mass of a polymer are respectively 40,000 and 30,The polydispersity index of polymer will be:
  • $$ < 1$$
  • $$ > 1$$
  • $$1$$
  • $$0$$
Polymers of the type $$Z – M_n – Y$$, i.e. those which contain a foreign molecule in addition to the recurring unit are known as:
  • Semisynthetic polymers
  • Atactic polymers
  • Telomers
  • Plasticiser
The product of addition polymerisation reaction is:
  • PVC
  • Nylon
  • Terylene
  • Polyamide
The process of vulcanisation makes rubber:
  • Soluble in water
  • Elastic
  • Hard
  • Soft
Which of the following is a chain growth polymer?
  • Nylon-6
  • Dacron
  • Glyptal
  • Polypropylene
An example of chain growth polymer is.
  • Nylon-66
  • Bakelite
  • Terylene
  • Teflon
Which of the following has cross-links?
  • Vulcanised rubber
  • Nylon
  • Phenol-formaldehyde resins
  • Both (a) and (c) 
Which of the following statement is correct regarding the drawbacks of raw rubber?
  • It is plastic in nature
  • It has little durability
  • It has large water-absorption capacity
  • All of these
Neoprene is a polymer of:
  • Propene
  • Vinyl chloride
  • Chloroprene
  • Butadiene
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