Synthetic Fibres and Plastics (CBSE Class-8 Science): Questions 9 - 15 of 21

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Question number: 9

» Synthetic Fibres and Plastics » Synthetic Fibres » Natural and Man-Made Fibres

MCQ▾

Question

Synthetic fibres are also called as:

Choices

Choice (4) Response

a.

Man-made fibres

b.

Elastic fibres

c.

Chemical fibres

d.

Artificial fibres

Question number: 10

» Synthetic Fibres and Plastics » Plastics » Thermosetting Plastics

MCQ▾

Question

Plastics whose shape cannot be changed even by heating are:

Choices

Choice (4) Response

a.

Thermoplastic

b.

a and b

c.

Thermosetting

d.

Polythene

Question number: 11

» Synthetic Fibres and Plastics » Types of Synthetic Fibres » Characteristics of Synthetic Fibres

MCQ▾

Question

The characteristics of synthetic fibres are:

Choices

Choice (4) Response

a.

Not attacked by insects and pests

b.

More durable

c.

Less Expensive

d.

All a. , b. and c. are correct

Question number: 12

» Synthetic Fibres and Plastics » Types of Synthetic Fibres » Rayon

MCQ▾

Question

Another name for rayon is:

Choices

Choice (4) Response

a.

Synthetic fibre

b.

Artificial fibre

c.

Artificial silk

d.

Man-made fibre

Question number: 13

» Synthetic Fibres and Plastics » Plastics as Materials of Choice » Plastic Is Non-Reactive

MCQ▾

Question

Plastic is used for storing chemicals in laboratory because

Choices

Choice (4) Response

a.

Plastic containers do not get corroded

b.

They resist chemical attack

c.

It is non-reactive

d.

All a. , b. and c. are correct

Question number: 14

» Synthetic Fibres and Plastics » Plastics » Thermoplastics

MCQ▾

Question

The plastic which can be moulded is

Choices

Choice (4) Response

a.

Thermosetting

b.

Polythene

c.

None

d.

Thermoplastic

Question number: 15

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

MCQ▾

Question

Polyester is inert to sea water thus it is used for making of:

Choices

Choice (4) Response

a.

Sail boats, water hoses for fighting and as a packing material for food

b.

For making base of magnetic recording tape.

c.

For making bottles and containers

d.

For making swim wears

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