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 not a natural rubber?
- (a)
polybutadiene
- (b)
polychloroprene
- (c)
polyisoprene
- (d)
buna-S
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
The correct strength of the polymer on the basis of the magnitude of intermolecular forces is
- (a)
elastomer > thermoplastic > fibres > thermosetting
- (b)
thermosetting > fibres > thermoplastics > fibre > thermosetting
- (c)
thermosetting > fibres > thermoplastics > elastomers
- (d)
None of these
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
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
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
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
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
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
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
Nylon threads are made up of
- (a)
polyvinyl polymer
- (b)
polyester polymer
- (c)
polyamide polymer
- (d)
polyethylene polymer