WorksheetsSynthetic fibres and plastics, class 8
Total questions: 15
Worksheet time: 8mins
Which of the following polymers is not made by humans in an industrial process?
Melamine
Bakelite
Nylon
Acrylic
Silk
Which of the following statements is/are false?
Cellulose is a polymer that is made up of a large number of small glucose molecules joined one after the other.
Wood contains a very less amount of cellulose polymer.
The small molecules that join together to form a polymer are called monomers
Which of the following man-made fibers is made from a natural material called cellulose?
Polyester
Rayon
Nylon
Acrylic
Which of the following is not a property of nylon?
Nylon is a thermoplastic polymer.
Nylon fibers are fairly strong and elastic
Nylon fibers are lightweight and lustrous.
It is cheaper than natural silk and can be woven like silk fiber.
Which of the following fiber threads is actually stronger than a steel wire of similar thickness?
Wool
Silk
Nylon
Cotton
Which of the following is not a characteristic of synthetic fibers?
Synthetic fibers are very durable.
Synthetic fibers absorb very little water.
Synthetic fibers are wrinkle resistant.
Synthetic fibers are extremely thick and strong.
Polyester is a synthetic fiber in which the polymer units are linked by ester groups. Which of the following is not a property of polyester?
Polyester fibers are weaker in strength than nylon fibers.
Polyester fiber is not attacked by moths and ordinary chemicals.
Polyester is a thermoplastic polymer.
Polyester fibers are softer than nylon fibers.
Which of the following is a fire-resistant plastic and is used to coat the uniforms of firemen?
Teflon
Melamine
Bakelite
PVC
Which of the following plastics is used for making electric switches, plugs and sockets?
Polythene
Polyvinyl chloride Melamine
Melamine
Bakelite
Which of the following arrangements is the correct order of fabrics in their decreasing strength?
Polyester - Nylon - Silk - Cotton - Wool
Nylon - Polyester - Silk - Cotton - Wool
Wool - Nylon - Silk - Cotton - Polyester
Polyester - Nylon - Cotton - Silk - Wool
In which of the following plastics are the long polymer chains cross-linked with one another?
Acrylic
Bakelite
Polyester
Nylon
Polycot is made by mixing two types of fibres namely
Silk+cotton
Wool+cotton
Polyester+Cotton
Polyethylene+Cotton
The coating on modern non- stick cookware and electric iron is of
Terrycot
Rayon
Teflon
Nylon
The 4R principle is
Reduce, Reuse, Recycle, Recover
Remember, Reduce, Recycle, Rejoice
Repeat, Recycle, Rejoice, Reduce
None of these
The plastics which do not remould again on heating are called:
Thermosetting plastics
Thermoplastics
Both of these
None of these
