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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