Synthetic Fibres and Plastics (CBSE Class-8 Science): Questions 16 - 21 of 21

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Question number: 16

» Synthetic Fibres and Plastics » Types of Synthetic Fibres » Nylon

MCQ▾

Question

One fully synthetic fibre is:

Choices

Choice (4) Response

a.

Nylon

b.

Rayon

c.

Polyesters

d.

Acrylic fibres

Question number: 17

» Synthetic Fibres and Plastics » Plastics » Thermosetting Plastics

MCQ▾

Question

Bakelite is an example of:

Choices

Choice (4) Response

a.

a and b

b.

Thermosetting plastics

c.

Thermoplastic plastics

d.

Polythene

Question number: 18

» Synthetic Fibres and Plastics » Plastics » Thermoplastics

MCQ▾

Question

What are the characteristics of thermoplastic?

Choices

Choice (4) Response

a.

They soften on warming.

b.

They stretch easily.

c.

They are flexible.

d.

All a. , b. and c. are correct

Question number: 19

» Synthetic Fibres and Plastics » Types of Synthetic Fibres » Polyester and Acrylic

MCQ▾

Question

Acrylic fibres are made from:

Choices

Choice (4) Response

a.

Crude oil

b.

Acrylic acid or its derivatives

c.

Cellulose

d.

Coal, water and air

Question number: 20

» Synthetic Fibres and Plastics » Plastics as Materials of Choice » Plastics Are Poor Conductors

MCQ▾

Question

Handles of frying pans and all electric wires used in household are made up of:

Choices

Choice (4) Response

a.

Rayon

b.

Plastics

c.

Nylon

d.

All

Question number: 21

» Synthetic Fibres and Plastics » Synthetic Fibres » Polymer

MCQ▾

Question

What are Polymers

Choices

Choice (4) Response

a.

Synthetic Fibres

b.

Giant molecules which are made of many repeating units

c.

Fibres

d.

Natural Fibres

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