CBSE Questions for Class 8 Chemistry Synthetic Fibres And Plastics Quiz 3 - MCQExams.com

$$X$$ is a thread or filament from which $$Y$$ is made. If prepared from plants and animals, it is known as $$Z$$ fibres whereas by humans it is known as $$W$$ fibres. Artificial or synthetic fibres are nylon, rayon, polyester, acrylic, etc.

What is $$Z$$?
  • Artificial
  • Natural
  • Both A and B
  • None of the above
Ropes made of _______ are used in cranes and lifts.
  • rayon
  • nylon
  • acrylic
  • spandex
Which of the following is/are synthetic fibres?
  • Wool
  • Cotton
  • Acrylic
  • Polystyrene
Which of the following is a natural fibre?
  • Polythene
  • PVC
  • Nylon
  • Wool
Which is generally a bad conductor of electricity?
  • Iron
  • Copper
  • Gold
  • Plastics
To save the environment from the harmful effects of plastics, we should follow the 5R principle. Which of the following is(are) the processes that should be followed under this principle?
  • Reduce
  • Reuse
  • Remember
  • Retest
Which of the following applications indicates that plastics are bad conductors of electricity?
  • Buckets are made of plastics
  • Electrical wires are covered with plastics
  • Cooking pans have plastic handles
  • Plastics are used to make packaging materials
The small fluffy fibres are:
  • bolls
  • burrs
  • reels
  • combs
Which of the following takes a long time to decompose?
  • Jute
  • Cotton
  • Wool
  • Plastic
Which of the following statement is true?
  • A nylon thread is stronger than a steel wire
  • Rayon is a natural fibre made from wood pulp
  • Cotton is not a polymer
  • Fabric made from polyester can get wrinkles easily
Which of the following statements about nylon fibre is true?
  • A nylon thread is stronger than a steel wire.
  • Nylon fibre is non-elastic.
  • Nylon is non-lustrous.
  • Nylon is light and difficult to wash.
Polycot is a mixture of:
  • Cotton and nylon
  • Polyester and nylon
  • Polyester and cotton
  • Wool and polyester
Which of the following will be suitable for coating dress materials of fire - men ?
  • Nylon
  • Polyster
  • Melamine
  • Acrylic
What is recycling?
  • Burning of material
  • Breakdown of material by natural processes
  • Recovering and reprocessing materials into useful products
  • Burying products
Electrical wires have a coating of an insulated material. The material generally used is:
  • sulphur
  • graphite
  • PVC
  • None of the above
Given below are two groups of material used to make dress articles. On what basis these have been grouped?
$$\boxed{\begin{matrix}Jute\\Cotton \end{matrix}}$$ $$\boxed{\begin{matrix}Wool\\Silk \\ Leather\end{matrix}}$$ 
  • Synthetic
  • Natural
  • Both $$A$$  and $$B$$
  • None of the above
To which of the following "4R" principle apply most?
  • Synthetic fibre
  • Natural fibre
  • Plastic
  • Metals
Which one among the following is a thermosetting plastic?
  • PVC
  • Polyethene
  • Bakelite
  • All of these
Which of the following can't be decomposed naturally?
  • Acrylic
  • PVC
  • Polyethene
  • All of the above
PET is a form of:
  • nylon
  • polyester
  • acrylic
  • rayon
Which of the following properties of plastic make it most convenient to use?
  • It is non-reactive
  • Light, strong and durable
  • Easily remouldable
  • All of the above
Melamine plastic is used as:
  • kitchenware
  • floor tiles
  • fire-proof fabric
  • All of these
Artificial (man-made) wool is known by the name:
  • rayon
  • acrylic
  • polycot
  • none of these
Plastics find extensive use because it is:
  • light
  • strong
  • durable
  • All of these
Which of the following is non biodegradable?
  • Plastic
  • Cotton
  • Paper
  • Left over food stuff
Rayon or artificial silk is obtained from :
  • cocoon
  • petroleum
  • silk fibre
  • wood pulp
Which of the following is NOT true?
  • Thermosetting plastic are bad conductors of heat and electricity.
  • Thermoplastics are good conductor of heat and electricity.
  • Plastic do not get corroded easily.
  • Plastic is also a polymer.
Which type of cloth dries faster in rainy season?
  • Cotton
  • Wool
  • Polyester
  • Silk
What are the two types of arrangement in plastics ?
  • Linear, Horizontal
  • Horizontal, Cross-linked
  • Linear, Cross-linked
  • Linear, Vertical
Which material is used for making:
(i) Saucepan handles
(ii) Electric plugs/switches/plugboards
  • Bakelite
  • PVC
  • Polythene
  • Polyester
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