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  • Class 8 Science Study Material

An Educational platform for Preparation and Practice Class 8. Kidsfront provide unique pattern of learning Science with free online comprehensive study material in the form of QUESTION & ANSWER for each Chapter of Science for Class 8. This study material help Class 8, Science students in learning every aspect of Synthetic Fibres and Plastics. Students can understand Synthetic Fibres and Plastics concept easily and consolidate their learning by doing Online Practice Tests on Science,Synthetic Fibres and Plastics chapter repeatedly till they excel in Class 8, Synthetic Fibres and Plastics. Free ONLINE PRACTICE TESTS on Class 8, Synthetic Fibres and Plastics comprise of Hundreds of Questions on Synthetic Fibres and Plastics, prepared by the highly professionals team. Every repeat test of Synthetic Fibres and Plastics will have new set of questions and help students to prepare themselves for exams by doing unlimited Online Test exercise on Synthetic Fibres and Plastics. Attempt ONLINE TEST on Class 8,Science,Synthetic Fibres and Plastics in Academics section after completing this Synthetic Fibres and Plastics Question Answer Exercise.


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Synthetic Fibres and Plastics
The first fully man made fibre was

a) Polyester.
b) Acrylic.
c) Rayon.
d) Nylon.



Answer
Solution
Correct Answer Is : Nylon.
Solution Is : Nylon is a man-made fibre.In 1931, it was made without using any natural raw material (from plant or animal).It was prepared from coal, water and air.It was the first fully synthetic fibre.
Rayon was obtained by the chemical treatment of

a) Paper.
b) Wood pulp.
c) Fruit pulp.
d) Cloth.



Answer
Solution
Correct Answer Is : Wood pulp.
Solution Is : Towards the end of the nineteenth century, scientists were successful in obtaining a fibre having properties similar to that of silk.Such a fibre was obtained by the chemical treatment of wood pulp.This fibre was called as rayon or artificial silk.
An example of natural fibre is

a) Nylon.
b) Polyester.
c) Rayon.
d) Cotton.



Answer
Solution
Correct Answer Is : Cotton.
Solution Is : Cotton is a natural fibre and is obtained from cotton plant.Nylon, polyester and rayon are man-made or synthetic fibres.
A polyester fibre is

a) Rayon.
b) Terelene.
c) Nylon.
d) Acrylic.



Answer
Solution
Correct Answer Is : Terelene.
Solution Is : Terelene is a synthetic fibre made of a chemical called terephthalic acid.It is used for clothing, sheets, ropes, sails, etc.
The synthetic fibre which resembles with wool is

a) Nylon.
b) Polycot.
c) Polytester.
d) Acrylic.



Answer
Solution
Correct Answer Is : Acrylic.
Solution Is : Many of the sweaters that we use are actually not made from natural wool, though they appear to resemble with wool.These are prepared from another type of synthetic fibre called acrylic.The wool obtained from natural sources is quite expensive, whereas clothes made from acrylic are relatively cheap.
An example for man made fibre is

a) Acrylic.
b) Silk.
c) Cotton.
d) Jute.



Answer
Solution
Correct Answer Is : Acrylic.
Solution Is : Acrylic is a man- made fibre. They are actually not made from natural wool, though they appear to resemble wool. These are prepared from another type of synthetic fibre called acrylic. Cotton, silk and jute are natural fibres.
The synthetic fibre also known as artificial silk is

a) Rayon.
b) Acrylic.
c) Nylon.
d) PET.



Answer
Solution
Correct Answer Is : Rayon.
Solution Is : Scientists were successful in obtaining a fibre having properties similar to that of silk.Such a fibre was obtained by the chemical treatment of wood pulp.This fibre was called rayon or artificial silk.
Parachutes and ropes used for climbing a mountain are made of

a) Rayon.
b) Polyester.
c) Acrylic.
d) Nylon.



Answer
Solution
Correct Answer Is : Nylon.
Solution Is : Nylon is used for making parachutes and ropes for rock climbing.A nylon thread is even stronger than a steel wire.
An example of a non-biodegradable substance is

a) Paper.
b) Wood.
c) Tin can.
d) Woolen clothes.



Answer
Solution
Correct Answer Is : Tin can.
Solution Is : A material which is not easily decomposed by natural processes is termed as non-biodegradable.Tin can is non-biodegradable.
Cotton is a polymer of

a) Fructose.
b) Glucose.
c) Maltose.
d) Sucrose.



Answer
Solution
Correct Answer Is : Glucose.
Solution Is : Cotton is a polymer called cellulose.Cellulose is made up of a large number of glucose units.