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Synthetic Fibres And Plastics
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Q.1
Plastics which get deformed easily on heating and can be bent easily are known as thermoplastics
Ture
False
Q.2
Teflon is a special plastic on which oil and water do net stick.
Ture
False
Q.3
The materials which is not easily decomposed by natural processes is called biodegradable.
False
true
Q.4
Characteristics of synthetic fibres :
They are Strong, durable
Absorb very less water
Wrinkle resistant, light weight
All of above
Q.5
The properties of plastic
Poor conductors of electricity
Cheap
Strong, durable
All of above
Q.6
Which of these is a fibre derived from chemicals?
Cotton
Nylon
Rayon
Silk
Q.7
State if true or false. Plastics are poor conductors of heat
True
False
Q.8
List the 5Rs.
Reduce, Reuse, Recycle, Recover, Refuse
None
There are only 3 options. Reduce, Reuse and Recycle
None of these
Q.9
There are two properties of rayon below. Select the two correct properties.
It is a versatile fibre.
IIt can be dyed in different colours.
It do not emit any toxic substances.
Both A & B
Q.10
Name the form of polyester which is replacing materials like glass and used for making bottles and jars.
Polymer
Plastic
PET
PVC
Q.11
What is the full form of PVC?
Polyvinyl Chloride
Permanent Virtual Circuit
Both A & B
None of these
Q.12
What is Ester?
A fibre
A sweet-smelling compound.
Polymer + polyester
None of the above
Q.13
Name a basic component of animal fibres.
Protein
cellulose
fats
animal calls
Q.14
Synthetic fibres are synthesised from a raw material called ________.
PET
PVC
petrochemicals
thermosetting plastics
Q.15
The uniforms of firemen have coating of __________ plastic to make them flame resistant.
terylene
bakelite
PET
melamine
Q.16
A polymer is a chain of many small units joined together which is called
synthetic fibres
monomers
PVC
None of these
Q.17
Artificial wool is called
acrylic
Rayon
Polycot
None of these
Q.18
Which fibre is used to make parachutes?
nylon
Rayon
Teflon
Jute
Q.19
Terylene + cotton =
terrysilk
terrywool
terycot
none
Q.20
Which synthetic fibre is called as an artificial silk?
Nylon
Rayon
Terylene
Polymer
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