IISER Chemistry - Synthetic and natural polymers
Exam Duration: 45 Mins Total Questions : 30
Natural rubber is a polymer of
- (a)
styrene
- (b)
butadiene
- (c)
isoprene
- (d)
acrylonitrile
Which one of the following is used as a substitute of wool fibre?
- (a)
nylon 66
- (b)
teflon
- (c)
ethyl acrylate
- (d)
acrylonitrile
Teflon is the polymer of
- (a)
monochloro trifluoro ethylene
- (b)
trtrafluoro ethylene
- (c)
vinyl fluoride
- (d)
isoprene
glyptal is a polymer of
- (a)
ethylene glycol and phthalic acid
- (b)
ethylene glycol and terephthalic acid
- (c)
phenol and formaldehyde
- (d)
malamine and formaldehyde
Which one of the following is not correct?
- (a)
stronger
- (b)
usable over large range of temperature
- (c)
chemical resistant, and water resistant
- (d)
soft and flexiable
The plastic household crockery is prepared using
- (a)
malonic acid and hexamethylene diamine
- (b)
melamine and tetrafluoroethene
- (c)
malamine and vinyl acetate
- (d)
malamine and formaldehyde
Which one of the followingis used for making dentures?
- (a)
polyethyl acrylate
- (b)
polyacrylonitrile
- (c)
polymethyl methacrylate
- (d)
none of these
Commercial name of PMMA is
- (a)
lucite
- (b)
plexiglass
- (c)
acrylite
- (d)
all of these
Which one of the following is used for coating articles and cookwares to make them non-sticky?
- (a)
giyptal
- (b)
nylon-6
- (c)
nylon 66
- (d)
PTTE
Polymer formation from monomers starts by
- (a)
condensation reaction between monomers
- (b)
co-ordinate reaction between monomers
- (c)
conversation of monomers to monomer ions by protons
- (d)
hydrolysis of monomers
Which one of the following is not an expression for the determination of molecular mass of polymers?
- (a)
\(\frac { { \Sigma }_{ i }{ N }_{ i }{ M }_{ i } }{ { \Sigma }_{ i }{ N }_{ i } } \)
- (b)
\(\frac { { \Sigma }_{ i }{ N }_{ i }{ { M }_{ i } }^{ 2 } }{ { \Sigma }_{ i }{ N }_{ i }{ { M }_{ i } } } \)
- (c)
\(\frac { { \Sigma }_{ i }{ N }_{ i }{ { M }_{ i } } }{ { \Sigma }_{ i }{ N }_{ i }{ { { M }_{ i } }^{ 2 } } } \)
- (d)
\(\frac { { \Sigma }_{ i }{ C }_{ i }{ M }_{ i } }{ { \Sigma }_{ i }{ C }_{ i } } \)
Simple molecules from which a polymer is made up of are called
- (a)
monomer
- (b)
repeating unit
- (c)
isomer
- (d)
tautomer
Which of the following polymers of glucose is stored by animals?
- (a)
Cellulose
- (b)
Amylose
- (c)
Amylopectin
- (d)
Glycogen
Which of the following is an example of elastomer?
- (a)
Vulcanised rubber
- (b)
Dacron
- (c)
Polystyrene
- (d)
Malamine
Thermoplastics are
- (a)
cross-linked polymers
- (b)
molten polymer can be moulded indesired shape
- (c)
soften or melt on heating
- (d)
All of the above
Bakelite is an example of
- (a)
elastomer
- (b)
fibre
- (c)
thermoplastic
- (d)
thermosetting polymer
Which is true for terpolymers?
- (a)
a polymer of acrylonitrile, butadiene and styrene
- (b)
contains three monomers
- (c)
Examples is ABS plastic
- (d)
All of the above
A copolymer is obtained by polymerisation of
- (a)
one type of monomer units
- (b)
two types of monomer units
- (c)
three types of monomer units
- (d)
None of the above
Example of condensation polymer is
- (a)
teflon
- (b)
dacron
- (c)
polystyrene
- (d)
neoprene
Melamine formaldehyde resin is
- (a)
an addition polymer
- (b)
a copolymer
- (c)
a fibre type polymer
- (d)
dimer of melamine formaldehyde
Caprolactum is used to prepare for which of the following polymer?
- (a)
Malamine
- (b)
Nylon-6
- (c)
Nylon-66
- (d)
PMMA
Which of the following is used in coating non-sticking frying pans?
- (a)
Bakelite
- (b)
Perspex
- (c)
Orlon
- (d)
Teflon
Biodegradable polymers are
- (a)
degraded by microorganisms within a suitable period
- (b)
soluble in water
- (c)
Both (a) and (b)
- (d)
None of the above
Which of the following statements is/are not correct?
- (a)
High pressure polymerisation of ethylene in the presence of a free radical initiator gives highly branched polymer.
- (b)
The density of high pressure polymerised ethylene is more than that of low pressure polymerised ethylene
- (c)
Polymerisation of ethylene at low temperature and pressure results into a linear polymer with much less branched chains
- (d)
Low pressure polymerisation of ethylene can be done at a lower temperature using a Ziegler catalyst.
Match the column I with Column II.
Column I | Column II |
(i) Polyester of glycol and phthalic acid | (A) Novalac |
(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 | Dacron |
Select the correct option.
- (a)
(i) (ii) (iii) (iv) (v) C B E A D - (b)
(i) (ii) (iii) (iv) (v) B C A E D - (c)
(i) (ii) (iii) (iv) (v) A E D B C - (d)
(i) (ii) (iii) (iv) (v) B D C E A
Given the polymers,
A = Nylon-6.6; B = Buna-S
C = Polyethene.
Arrange these in increasing order of their intermolecular forces (lower to higher.)
- (a)
A < B < C
- (b)
B < C < A
- (c)
B > A > C
- (d)
C < A < B
Relation between number of average molecular mass \(\left( \overline { { M }_{ n } } \right) \) and weight of average molecular mass \(\left( \overline { { M }_{ w } } \right) \) of synthetic polymers is
- (a)
\(\bar { { M }_{ n } } <\bar { { M }_{ w } } \)
- (b)
\(\bar { { M }_{ n } } >\bar { { M }_{ w } } \)
- (c)
\(\bar { { M }_{ n } } =\bar { { M }_{ w } } \)
- (d)
\({ M }_{ n }>{ M }_{ w }\)
The species which can best serve as an initiator for cationic polymerisation is
- (a)
LiAlH4
- (b)
HNO3
- (c)
AlCl3
- (d)
BaLi
The polymer containing strong intermolecular forces, like hydrogen bonding is
- (a)
teflon
- (b)
nylon-66
- (c)
polystyrene
- (d)
natural rubber
Which of the following is fully fluorinated polymer?
- (a)
PVC
- (b)
Thiokol
- (c)
Teflon
- (d)
Neoprene