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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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  • Topic wise:Synthetic Fibres and Plastics preparation in the form of QUESTION & ANSWER.
  • Evaluate preparation by doing ONLINE TEST of Class 8, Science,Synthetic Fibres and Plastics.
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  • Attempt repeat ONLINE TESTS of Science Synthetic Fibres and Plastics till you excel.
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Synthetic Fibres and Plastics
While working in laboratory, one should wear clothes made of

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

Correct Answer Is : Cotton.
Solution Is : Clothes made of synthetic fibres catch fire easily.The fabric melts and sticks to the body of the person wearing it.Therefore,we should not wear synthetic clothes while working in the kitchen or in a laboratory.
Paper is classified under

a) Wool.
b) Plastic.
c) Non-biodegradable substances.
d) Biodegradable substances.

Correct Answer Is : Biodegradable substances.
Solution Is : A material which gets decomposed through natural processes, such as the action of bacteria, is called biodegradable.
Polyester is made of repeating units of chemical called as

a) Ether.
b) Ester.
c) Acid.
d) Alcohol.

Correct Answer Is : Ester.
Solution Is : Polyester is a polymer made of repeating units of esters.
Fabric polycot is prepared by mixing

a) Polyester with wool.
b) Polyester with acrylic.
c) Polyester with cotton.
d) Polyester with nylon.

Correct Answer Is : Polyester with cotton.
Solution Is : As the name suggests, these are made by mixing two types of fibres.Polycot is a mixture of polyester and cotton.
Synthetic fibres are

a) Costly.
b) Materials that dry up quickly.
c) Not durable.
d) Difficult to maintain.

Correct Answer Is : Materials that dry up quickly.
Solution Is : Synthetic fibres are more durable and affordable.This makes them more popular than the natural fibres.
Plastics are

a) Natural substance.
b) Bio degradable.
c) Non bio-degradable.
d) Very reactive.

Correct Answer Is : Non bio-degradable.
Solution Is : Plastics are non-biodegradable.
Petroleum is the main source of

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

Correct Answer Is : Acrylic.
Solution Is : Acrylic is a synthetic fibre and all the synthetic fibres are prepared by a number of processes using raw materials of petroleum origin, called petrochemicals.
A common form of polyester is

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

Correct Answer Is : PET.
Solution Is : PET is a form of Polyester.It is commonly used to manufacture bottles and containers.Is is made up of the repeating units of a chemical called as ester.
Plastic containers are preferred over iron containers for storing food because, plastic is

a) Reactive.
b) Non-reactive.
c) Costly.
d) Heavy in weight.

Correct Answer Is : Non-reactive.
Solution Is : Plastic is non-reactive, durable, cheap and light in weight.It is corrosion resistant.
The plastics that can be repeatedly molten and given new shapes are called

a) Thermoplastics.
b) Thermosetting plastics.
c) Elastomers.
d) Monomers.

Correct Answer Is : Thermoplastics.
Solution Is : Plastic which gets deformed easily on heating and can be bent easily are known as thermoplastics.Polythene and PVC are some of the examples of thermoplastics.
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