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What are polymers?
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How are polymers classified on the basis of structure?
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Write the names of monomers of the
following polymers ;
(i)
(ii)
(iii)
(i) Since amide linkage
is
present, it is a polymer of diaminehaving 6 C atom and diacid having 6 C atoms.
(ii) It also contains amide linkage
but with in the same molecule, so itcontains>CO and amine group within a
ring.
(iii) It contains the same monomer and
repeating .unit so it is an additionpolymer of a monomer containing double
bond. Moreover, absence offunctional group also shows the unsaturation.
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Classify following as addition and condensation polymers:Terylene, bakelite, polyvinyl chloride, polythene.
(i) Addition polymers are obtained from unsaturated monomers andcondensation polymers are obtained from the monomerscontaining by functional groups.
(ii) Monomers of terylene, bakelite, PVC and polythene are phthalicacid + ethylene glycol, phenol + HCHO, vinyl chloride and ethene.
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Explain the difference between buna-N and buna-S.
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Arrange the following polymers in increasing order of theirintermolecular forces.
(i) Nylon-6, 6, buna-S, polythene.
(ii) Nylon-6, neoprene, polyinyl chloride
The order of intermolecular forces in different polymers is Easterners <plastics < fibres. So first classify the given polymer into the aboveclasses and then arrange them in increasing order of forces.
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Explain the terms polymer and monomer.
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What are natural and synthetic polymers? Give twoexamples of each type.
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Distinguish between the terms homopolymer andcopolymer and given an example of each.
Homopolymer: Single monomer
Copolymer: More than one monomers. Give definition on this basis.
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How do you explain the functionality of a monomer?
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Define the term polymerization.
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Is
a homopolymer or
copolymer?
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In which classes, the polymers are classified on the basis ofmolecular forces?
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How can you differentiate between addition andcondensation polymerization?
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Explain the term copolymerization and give two examples.
It includes involvement of two or more monomers, for polymerization.
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Write the free radical mechanism for the polymerizationof ethene.
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Define thermoplastics and thermosetting polymers withtwo examples of each.
Effect of heat on these polymers is the basis of this classification.
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Write the monomers used for getting the followingpolymers.
(i) Polyvinyl chloride (ii) Teflon (iii) Bakelite
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Write the name and structure of one of the common initiators used in free radical addition polymerization.
Peroxides play this role.
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How does the presence of double bonds in rubbermolecules influence their structure and reactivity?
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Discuss the main purpose of vulcanization of rubber.
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What are the monomeric repeating units of nylon-6 andnylon-6,6?
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Write the name and structures of the monomers of thefollowing polymers.
(i) Buna-S (ii) Buna-N (iii) Dacron (iv) Neoprene
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Identify the monomer in the following
polymeric structures.
(i)
c
(ii)
(i) Break ?CO ?NH ? bond and add
to
get the structure of monomers.
(ii) Break
bond and add
to
get the structure of monomers.
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How is Dacron obtained from
ethylene glycol and terephthalic acid?
Formula of
ethylene glycol is 
and of
terephthalicacid
. The process involves
condensation polymerization. i.e., removal of water.
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What is a biodegradable polymer? Give an example of abiodegradable aliphatic polyester.
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question_answer27)
Which
of the following polymers of glucose is
stored by animals ?
(a) Cellulose (b) Amylose
(c) Amylopectin (a) Glycogen
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question_answer28)
Which
of the following is not a semi synthetic polymer ?
(a) cis-Polyisoprene (b) Cellulose nitrate
(c) Cellulose acetate (d) Vulcanised rubber
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question_answer29)
The
commercial name of polyacrylonitrile is
(a) Dacron (b) Orion (acrilan)
(c) PVC (d) Bakelite
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question_answer30)
Which
of the following polymer is biodegradable ?
(a)
(b)
(c)
(d)
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question_answer31)
In
which of the following polymers, ethylene
glycol is one of the momoner units ?
(a)
(b)
(c)
(d)
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question_answer32)
Which
of the following statements is not about low density polythene ?
(a) Tough (b) Hard
(c) Poor conductor of electricity
(d) Highly branched structure
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question_answer33)
is a polymer having
unit
(a) (b)
(c) (d)
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question_answer34)
Which
of the following polymer can be for by using the following monomer unit?
(a) Nylon 6, 6 (b) Nylon 2-nylon 6
(c) Melamine polymer (d) Nylon-6
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question_answer35)
Which
of the following polymers, need atleast one diene monomer for their preparation
?
(a) Dacron (b) Buna-S
(c) Neoprene (d) No volac
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question_answer36)
Which
of the following are characteristics of
thermosetting polymers ?
(a) Heavily branched cross linked polymers
(b) Linear slightly branched long chain molecules
(c) Become infusible on moulding so cannot be reused
(d) Soften on heating and harden on cooling, can be reused
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question_answer37)
Which
of the following polymers are thermoplastic ?
(a)Teflon (b) Natural rubber
(c) Neoprene (d) Polystyrene
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question_answer38)
Which
of the following polymers are used as
fibre?
(a) Polytetrafluoroethane
(b) Polychloroprene
(c) Nylon (a)Terylene
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question_answer39)
Which
of the following are addition polymers?
(a) Nylon
(b) Melamine formaldehyde resin
(c) Orion (d) Polystyrene
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question_answer40)
Which
of the following polymers are condensation polymers ?
(a) Bakelite (b) Teflon
(c) Butyl rubber
(d) Melamine formaldehyde resin
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question_answer41)
Which
of the following monomers form biodegradable polymers ?
(a) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid
(b) Glycine + aminocaproic acid
(c) Ethylene glycol + phthalic acid
(d) Caprolactum
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question_answer42)
Which
of the following are exmples of synthetic rubber ?
(a) Polychloroprene (b) Polyacrylonitrile
(c) Buna-N (d) cis-Polyisoprene
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question_answer43)
Which
of the following polymers can have strong intermolecular forces ?
(a) Nylon (b) Polystyrene
(c) Rubber (d) Polyesters
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question_answer44)
Which
of the following polymers have vinylic
monomer units ?
(a) Acrilan (b) Polystyrene
(c) Nylon (d) Teflon
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question_answer45)
Vulcanisation
makes rubber.........
(a) more elastic
(b) soluble in inorganic solvent
(c) crystalline (d) more stiff
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question_answer46)
A
natural linear polymer of2-methyl-l, 3-butadiene becomes hard on treatment with
sulphur between 373 to 415 K and ?S?S? bonds are formed between chains. Write
the structure of the product of this treatment ?
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question_answer47)
Identify
the type of polymer.
?A?A?A?A?A?A?
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question_answer48)
Identify
the type of polymer.
?A?B?B?A?A?A?B?A?
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question_answer49)
Out
of chain growth polymerisation and step growth polymer is ation, in which type
will you place the " following :
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question_answer50)
Identify
the type of polymer given in the following figure.
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question_answer51)
Identify
the polymer given below :
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question_answer52)
Why
are rubbers called elastomers ?
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question_answer53)
Can
enzyme be called a polymer ?
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question_answer54)
Can
nucleic acids, proteins and starch be considered as step growth polymers ?
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question_answer55)
How
is the following resin intermediate prepared and which polymer is formed by
this monomer unit ?
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question_answer56)
To
have practical applications why are cross links required in rubber ?
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question_answer57)
Why
does cis-polyisoprene possess elastic property ?
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question_answer58)
What
is the structural difference between HDP and LDP? How does the structure
account for different behaviour and nature, hence the use of a polymer ?
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question_answer59)
What
is the role of benzoyl peroxide in addition polymerisation of alkenes ? Explain
its mode of action with the help of an example.
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question_answer60)
Which
factor imparts crystalline nature to a polymer like nylon ?
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question_answer61)
Name
the polymers used in laminated sheets and give the name of monomeric units
involved in its formation.
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question_answer62)
Which
type of bio molecules have some structural similarity with synthetic polyamides
? What is this similarity ?
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question_answer63)
Why
should the monomers used in addition polymerisation through free radical
pathway be very pure ?
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question_answer64)
Match
the polymer of column I with correct monomer of column II.
|
|
Column I
|
|
Column II
|
|
(i)
|
High density polythene
|
(a)
|
Isoprene
|
|
(ii)
|
Neoprene
|
(b)
|
Tetrafluoroethene
|
|
(iii)
|
Natural rubber
|
(c)
|
Chloroprene
|
|
(iv)
|
Teflon
|
(d)
|
Acrylonitrile
|
|
(v)
|
Acrilan
|
(e)
|
Ethene
|
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question_answer65)
Match
the polymers given in Column I with their chemical names given in Column II.
|
|
Column I
|
|
Column II
|
|
(i)
|
Nylon 6
|
(a)
|
Polyvinyl chloride
|
|
(ii)
|
PVC
|
(b)
|
Polyacrylonitrile
|
|
(iii)
|
Acrilan
|
(c)
|
Polycaprolactum
|
|
(iv)
|
Natural rubber
|
(d)
|
Low density polythene
|
|
(v)
|
LDP
|
(e)
|
Cis-Polyisoprene
|
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question_answer66)
Match
the polymers given in Column I with their commercial names given in Column n.
|
|
Column I
|
|
Column II
|
|
(i)
|
Polyester
of glycol and phthalic acid
|
(a)
|
Nvolac
|
|
(ii)
|
Copolymer
of 1,3-butadiene and styrene
|
(b)
|
Glyptal
|
|
(iii)
|
Phenol
and formaldehyde resin
|
(c)
|
Buna-S
|
|
(iv)
|
Polyester
of glycol and terephthalic acid
|
(d)
|
Buna-N
|
|
(v)
|
Copolymer
of 1, 3-butadiene and acrylonitrile
|
(e)
|
Dacron
|
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question_answer67)
Match
the polymers given in Column I with their main applications given in Column II.
|
|
Column I
|
|
Column II
|
|
(i)
|
Bakelite
|
(a)
|
Unbreakable
crockery
|
|
(ii)
|
Low
density polythene
|
(b)
|
Non-stick
cook wares
|
|
(iii)
|
Melamine-formaldehyde
resin
|
(c)
|
Packaging
material for shock absorbance
|
|
(iv)
|
Nylon
6
|
(d)
|
Electrical switches
|
|
(v)
|
Polytetrafluoroethene
|
(e)
|
Squeeze bottles
|
|
(vi)
|
Polystyrene
|
(f)
|
Tyre, cords
|
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question_answer68)
Match
the polymers given in Column I with the preferred mode of polymerisation
followed by their monomers.
|
|
Column I
|
|
Column II
|
|
(i)
|
Nylon- 6,6
|
(a)
|
Free radical polymerization
|
|
(ii)
|
PVC
|
(b)
|
Ziegler-Natta polymerization or coordination
polymerization
|
|
(iii)
|
HDP
|
(c)
|
Anionic polymerization
|
|
|
|
(d)
|
Condensation polymerisation
|
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question_answer69)
Match
the polymers given in Column I with the type of linkage present an them given
in Column II.
|
|
Column I
|
|
Column II
|
|
(i)
|
Terylene
|
(a)
|
Glycosidic linkage
|
|
(ii)
|
Nylon
|
(b)
|
Ester linkage
|
|
(iii)
|
Cellulose
|
(c)
|
Phosphodiester linkage
|
|
(iv)
|
Protein
|
(d)
|
Amide linkage
|
|
(v)
|
RNA
|
|
|
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question_answer70)
Match
materials given in Column I with the polymers given in Column II.
|
|
Column I
|
|
Column II
|
|
(i)
|
Natural rubber latex
|
(a)
|
Nylon
|
|
(ii)
|
Wood laminates
|
(b)
|
Neoprene
|
|
(iii)
|
Ropes and fibres
|
(c)
|
Dacron
|
|
(iv)
|
Polyester fabric
|
(d)
|
Melamine formaldehyde resins
|
|
(v)
|
Synthetic rubber
|
(e)
|
Urea-formaldehyde resins
|
|
(vi)
|
Unbreakable crockery
|
(f)
|
Cis-polyisoprene
|
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question_answer71)
Match
the polymers given in Column I with their repeating units given in Column II.
|
|
|
Column I
|
|
Column II
|
|
(i)
|
|
Acrilan
|
(a)
|
|
|
(ii)
|
|
Polystyrene
|
(b)
|
|
|
(iii)
|
|
Neoprene
|
(c)
|
 
|
|
(iv)
|
|
No volac
|
(d)
|
|
|
(v)
|
|
Buna-N
|
(f)
|
|
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question_answer72)
Assertion
: Rayon is a semi synthetic polymer and is taken as a better choice than
cotton fabric.
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question_answer73)
Assertion
: Most of the Synthetic polymers are not biodegradable.
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question_answer74)
Assertion
: Olefinic monomers undergo addition polymerisation.
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question_answer75)
Assertion:
Polyamides are best used as fibres because of high tensile strength.
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question_answer76)
Assertion:
For making rubber synthetically, isoprene molecules are polymerised.
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question_answer77)
Assertion:
Network polymers are thermosetting.
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question_answer78)
Assertion:
Polytetrafluoroethene is used in making non-stick cook wares.
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question_answer79)
Synthetic
polymers do not degrade in the environment for a long time. How can
biodegradable synthetic polymers be made. Differentiate between biopolymers and
biodegradable polymers and give examples of each type.
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question_answer80)
Differentiate
between rubbers and plastics on the basis of intermolecular forces.
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question_answer81)
Phenol
and formaldehyde undergo condensation to give a polymer (A) which on heating
with formaldehyde gives a thermosetting polymer (B). Name the polymers. Write
the reactions involved in the formation of (A). What is the structural difference
between two polymers?
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question_answer82)
Low
density polythene and high density polythene, both are polymers of ethene but
there is marked difference in their properties. Explain.
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question_answer83)
Which
of the following polymers soften on heating and harden on cooling? What are the
polymers with this property collectively called ? What are the structural
similarities between such polymers ?
Bakelite, urea-formaldehyde resin, polythene, polyvinyl, polystyrene.
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