CBSE Questions for Class 12 Engineering Chemistry Polymers Quiz 10 - MCQExams.com

The method preferred for determining the molecular weight of a polymer is___________.
  • osmotic pressure
  • gas density
  • lowering of freezing point
  • direct weighing of a single molecule
In the vulcanization of rubber:
  • sulphur reacts to form a new compound
  • sulphur cross-links are introduced
  • sulphur forms a very thin protective layer over rubber
  • All of the above
The field of polymer chemistry was revolutionised by :
  • Kharasch in USA
  • Kael Ziegler in Germany
  • Giulio Natta in Italy
  • Barton in England
Soft drinks and baby-feeding bottles are generally made of:
  • Polyurea
  • polyurethane
  • Polyester
  • Polyamide
  • polystyrene
Polymer formation form monomers starts by:
  • condensation reaction between monomers
  • conversion of monomer to monomer ions by protons
  • coordination reaction between monomers
  • hydrolysis of monomers
Which one of the following is used to make 'non-stick' cookware?
  • Polystyrene
  • PVC
  • Polyethylene terephthalate
  • Polytetra fluoroethylene
The commercial name of poly(methyl methacrylate) is:
  • Lucite
  • Plexiglas
  • Perspex
  • All the above
Z-average molar mass $$(\bar M _ {z})$$ is defined as:
  • $$\dfrac{\sum NiMi^2}{\sum NiMi}$$
  • $$\dfrac{\sum NiMi}{\sum Ni}$$
  • $$\dfrac{\sum NiMi^3}{\sum NiMi^2}$$
  • $$\dfrac{\sum NiMi^3}{\sum NiMi}$$
The abbreviation PDI refers to__________.
  • name of the polymer
  • polydispersity index of the polymer
  • application of the polymer
  • polydiagonal index
Which of the following is coated as a thin layer on the inner side of non-stick pans?
  • Bakelite
  • PVC
  • Teflon
  • Polypropylene
Vulcanised rubber resists:
  • wear and tear due to friction
  • cryogenic temperature
  • high temperature
  • action of acids
$$F_2C=CF_2$$ is a monomer of:
  • Teflon
  • Glyptal
  • Buna-S
  • Nylon 6
Match column I with column II.
Column I Column II
P. Non-stick coating(i). Melamine
Q. Flame resistant(ii). Polystyrene
R. First fully synthetic fibre(iii). Teflon
S. Thermoplastic(iv). Nylon
Choose the correctly matched option.
  • (P) - (ii), (Q) - (i), (R) - (iii), (S) - (iv)
  • (P) - (iii), (Q) - (i), (R) - (iv), (S) - (ii)
  • (P) - (ii), (Q) - (iii), (R) - (iv), (S) - (i)
  • (P) - (iii), (Q) - (iv), (R) - (ii), (S) - (i)
Pick out the incorrect statement amongst the following.
  • Nylon clothing can stand high temperature and are therefore good to wear in summers
  • Thermosetting plastics do not become soft on heating
  • Addition polymers are formed without the elimination of by-product molecules
  • Natural rubber is obtained as latex from rubber trees
Identify the fibres, $$P,\,Q$$ and $$R$$ using the given hints.
$$P.\;\;$$ It does not get wrinkled easily, remains crisp and is easy to wash.
$$Q.\;\;$$ It was the first fully synthetic fibre.
$$R.\;\;$$ Although it is obtained from a natural source, yet it is a man-made fibre.
  • P - Rayon, Q - Polythene, R - Terylene
  • P - Polyester, Q - Nylon, R - Rayon
  • P - Nylon, Q - Polythene, R - Bakelite
  • P - Melamine, Q - Nylon, R - Polyester
Natural rubber is heated with an element X to make it hard, strong and more elastic. X is:
  • zinc
  • sulphur
  • lead
  • $$H_2$$
Match the terms of column A correctly with the phrases given in column B.
Column-AColumn-B
(i) Polyester(a) Prepared by using wood pulp
(ii) Teflon(b) Used for making parachutes and stockings
(iii) Rayon(c) Electrical switches
(iv) Nylon(d) Fabrics do not wrinkle easily
(v) Bakelite(e) Fire resistant clothes
(vi) Melamine(f) Used to make non-stick cookwares
  • (i)-(d), (ii)-(f), (iii)-(a), (iv)-(b), (v)-(c), (vi)-(e)
  • (i)-(f), (ii)-(d), (iii)-(a), (iv)-(b), (v)-(c), (vi) -e)
  • (i)-(d), (ii)-(f), (iii)-(b), (iv)-(a), (v)-(c), (vi)-(e)
  • (i)-(a), (ii)-(f), (iii)-(d), (iv)-(b), (v)-(c), (vi)-(e)
Which of the following free radicals is the most stable ?
  • primary
  • methyl
  • secondary
  • tertiary
Rubber is hardened for making tyres by:
  • adding $$H_2$$
  • adding carbon black
  • saturating it
  • All of the above
Fomaldehyde is the starting material for the manufacture of :
  • Bakelite
  • Caprolactam
  • D.D.T
  • Rayon
The structure of isoprene is:
  • $$CH_2\, =\, C\, (C_2H_5)\, -\, CH\, =\, CH_2$$
  • $$CH_2\, =\, C\, (OCOH_3)\, -\, CH\, =\, CH_2$$
  • $$CH_2\, =\, C\, (CH_3)\, -\, CH\, =\, CH_3$$
  • $$CH_2\, =\, CH\, -\, C\, =\, CH$$
Which of the following is thermoresistant polymer ?
  • Orlon
  • Polythene
  • Teflon
  • Bakelite
Sulphur is used in:
  • welding
  • electroplating
  • vulcanising rubber
  • the manufacture of paints
The process by which smaller molecules combine to give a molecule with a higher molecular weight is known as :
  • condensation
  • polymerisation
  • catenation
  • isomerisation
Which polymer is used in non-stick cooking vessels?
  • Polythene
  • Isoprene
  • Teflon
  • Neoprene
A synthetic rubber which is resistant to the action of oils, gasoline and other solvents is:
  • buna-S
  • polyisoprene
  • neoprene
  • polystyrene
Which one of the following is not a biopolymer?
  • Cellulose
  • $$Nylon-6$$
  • Insulin
  • DNA
The monomer of neoprene is:
  • 1, 3-Butadiene
  • 2-Chloro-1, 3-butadiene
  • 2-Methyl-1, 3-butadiene
  • vinyl chloride
The structure of bakelite is :
Nylon-66 is an example of: 
  • polypropylene
  • polyester
  • polyamide
  • polystyrene
Dacron is obtained by the condensation polymerisation of :
  • dimethyl terephthalate and ethylene glycol
  • terephthalic acid and formaldehyde
  • phenol and phthalic acid
  • phenol and formaldehyde
Identify the co-polymer from the following:
  • $$[-CH_2-CH=CH_2-CH_2-CH(C_6H_5)-CH_2-]_n$$
  • $$[-CF_2-CF_2-]_n$$
  • $$[-CH_2-C(Cl)=CH-CH_2-]_n$$
  • $$[-CH_2-CH(Cl)-]_n$$
Synthetic polymer among the following is :
  • protein
  • plastic
  • starch
  • cellulose
  • nucleic acid
Example of a biodegradable polymer pair is:
  • nylon-6,6 and terylene
  • PHBV and dextron
  • bakelite and PVC
  • PET and polythylene
Nylon-6 is manufactured from which of the following?
  • maleic anhydride and hexamethylene diamine.
  • caprolactum
  • adipic acid and hexamethylene diamine.
  • sebasic acid and hexamethylene diamine.
A condensation polymer among the following polymers is:
  • Teflon
  • Polysterene
  • PVC
  • Dacron
The s-block element used as a catalyst in the manufacture of Buna-S rubber is :
  • $$Mg$$
  • $$Ca$$
  • $$Ba$$
  • $$Na$$
Which of the following is not true?
  • In vulcanisation the rubber becomes harder and stronger
  • Natural rubber has 'trans' configuration at every double bond
  • Buna-S is a co-polymer of Butene and styrene
  • Natural rubber is $$1, 4$$-polymer of isoprene
__________ is used for making parachutes and stockings.
  • Cotton
  • Nylon
  • Wool
  • Bakelite
Which one of the following is not a correct match?
  • Teflon- Tetrafluoroethylene
  • Plexi glass - Methyl methacrylate
  • Orlon - Glycerol, phthalic anhydride
  • Buna-S - Styrene, 1-3 butadiene
Bakelite is a _________.
  • phenol-formaldehyde resin
  • phenol-acetaldehyde resin
  • phenol-propanaldehyde resin
  • resin in alcohol
Sulphur is used for vulcanization of rubber to make it:
  • hard
  • elastic
  • malleable
  • soft
$$Buna-N$$, a synthetic rubber is copolymer of:
  • $$H_{2}C = CH - CH = CH_{2}$$ and $$H_{5}C_{6} - CH = CH_{2}$$
  • $$H_{2}C = CH- CN$$ and $$H_{2}C = CH - CH = CH_{2}$$
  • $$H_{2}C = CH -\overset {\overset {Cl}{|}}{C} = CH_{2}$$ and $$H_{2}C = CH - CH = CH_{2}$$
  • $$H_{2}C = CN - CN$$ and $$H_{2}C = CH - \underset {\underset {Cl}{|}}{C} = CH_{2}$$
Bakelite is a polymer of
  • benzaldehyde and phenol
  • acetaldehyde and phenol
  • formaldehyde and phenol
  • formaldehyde and benzyl alcohol
Teflon constitutes:
  • carbon,flourine & hydrogen
  • carbon,chlorine & hydrogen
  • carbon & flourine
  • carbon & chlorine
The IUPAC name for Teflon is:
  • polytrifluoroethane
  • polytetrafluoroethane
  • polytrifluoroethylene
  • polytetrafluoroethylene
Which of the following is monomer of natural rubber?
  • Isoprene
  • Chloroprene
  • Caprolactum
  • Styrene
Which of the following is incorrect regarding natural rubber ?
  • It is cis-polyisoprene
  • It is amorphous in nature
  • It has syndiotactic stereochemistry
  • Molecules of rubber have coiled conformation
Which of the following polymer is not an addition polymer?
  • Teflon
  • BUNA-N
  • PAN
  • Propylene
Synthetic human hair wigs are made from a copolymer of vinyl chloride and acrylonitrile and is called:
  • PVC
  • Polyacrylonitrile
  • Cellulose
  • Dynel
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