NSO Level 1- Science Olympiad (SOF) Class 8: Questions 512 - 515 of 1076

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Question number: 512

» Synthetic Fibres and Plastics

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MCQ▾

Question

Some of the most common blended fabrics are given in the questions. Find out the benefit of the blend over individual fabric.

Plastic is not environment friendly. The statements supporting this fact are

  1. It is not biodegradable.

  2. It produces a lot of poisonous gases on burning.

  3. It does not get completely burnt easily.

Choices

Choice (4) Response

a.

1,2 and 3

b.

1 and 2

c.

1 and 3

d.

2 and 3

Question number: 513

» Synthetic Fibres and Plastics

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MCQ▾

Question

Here are some points of difference between thermoplastics and thermosetting plastics. Choose the correct statements.

  1. Thermo plastic get deformed in presence of heat but thermosetting plastic is heat resistant.

  2. Thermoplastic can easily be recycled but Thermosetting plastic cannot be recycled.

  3. Thermoplastic can bend easily but thermosetting plastic when we try to bend it.

Choices

Choice (4) Response

a.

1,2 and 3

b.

1 and 2

c.

1 and 3

d.

2 and 3

Question number: 514

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

Some of the most common blended fabrics are given in the questions. Find out the benefit of the blend over individual fabric.

Plastic chairs are used in open air party plots. The reason behind this statement is

Choices

Choice (4) Response

a.

It is a poor conductor of heat

b.

It is water proof

c.

Plastic is noncorrosive

d.

All a. , b. and c. are correct

Question number: 515

» Synthetic Fibres and Plastics

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MCQ▾

Question

Plastic is more durable than metals because

Choices

Choice (4) Response

a.

Plastic do not react with air and water.

b.

It does not undergo correlation easily.

c.

Plastic is non reactive with almost all chemicals.

d.

All a. , b. and c. are correct

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