Synthetic Fibres and Plastics [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 7 of 21

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Question 1

Question MCQ▾

Plastics are:

Choices

Choice (4)Response

a.

Biodegradable

b.

Non-biodegradable

c.

All of the above

d.

None of the above

Edit

Question 2

Question MCQ▾

Rayon is called regenerated fibre because:

Choices

Choice (4)Response

a.

its formation is a case of purification of cellulose

b.

of the blending property of rayon

c.

its formation is the case of synthesis of cellulose

d.

of its shining softness and absorbing properties

Edit

Question 3

Question MCQ▾

Name one versatile material

Choices

Choice (4)Response

a.

Only a

b.

a and b

c.

Melamine

d.

Bakelite

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Question 4

Question MCQ▾

Examples of thermoplastic material are

Choices

Choice (4)Response

a.

Nylon, Polythene

b.

PVC, PTFE

c.

Bakelite

d.

Both a. and b. are correct

Edit

Question 5

Question MCQ▾

Blending property of polyesters is used in the formation of:

Choices

Choice (4)Response

a.

For making sarees.

b.

Mixed with wool to make long lasting fabrics

c.

Aprons and caps

d.

Terrycot, Terrywool, Terrysilk etc.

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Question 6

Question MCQ▾

Plastic is

Choices

Choice (4)Response

a.

Strong

b.

Light

c.

Durable

d.

All a., b. and c. are correct

Edit

Question 7

Question MCQ▾

Fibres obtained from plants and animals are called

Choices

Choice (4)Response

a.

Natural Fibres

b.

Cellulose

c.

Man-made Fibres

d.

Synthetic Fibres

Edit