Chemistry - Synthetic and Natural Polymers
Exam Duration: 45 Mins Total Questions : 30
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
The length of the chain of the polymer can be controlled during polymerisation by the addition of a reagent called
- (a)
toners
- (b)
inhibitors
- (c)
initiators
- (d)
poison
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
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
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
Polyisobutylene is obtained by
- (a)
free radical polymerisation
- (b)
cationic polymerisation
- (c)
anionic polymerisation
- (d)
coordination polymerisation
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
Arrange the following monomers in order of decreasing ability to undergo cationic polymerisation
\(I.\quad { NO }_{ 2 }{ C }_{ 6 }{ H }_{ 5 }-CH={ CH }_{ 2 }\)
\(II.\quad { CH }_{ 2 }=CH-{ C }_{ 6 }{ H }_{ 5 }{ CH }_{ 3 }\)
\(III.\quad { CH }_{ 2 }=CH-{ C }_{ 6 }{ H }_{ 5 }OCH_{ 3 }\)
- (a)
I > II > III
- (b)
II > I > III
- (c)
III > II > I
- (d)
I > III > II
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.
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