NSO Level 1- Science Olympiad (SOF) Class 8: Questions 497 - 502 of 1076

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Question number: 497

» Metals and Non-Metals

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MCQ▾

Question

Sita bought a copper lamp as a decorative piece and displayed it in her show case. After a month she found that it looked dull with green patches on it. She was so shocked to see this. The Chemical reaction taken place here is

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 498

» Metals and Non-Metals

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MCQ▾

Question

Bells are made of metals. Which property of metals is used here?

Choices

Choice (4)Response

a.

Metals are ductile

b.

Metals are lustrous

c.

Metals are malleable

d.

Metals are sonorous

Question number: 499

» Synthetic Fibres and Plastics

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MCQ▾

Question

Identify the polymers from its use

It is used as pipes in plumbing and electric wiring.

Choices

Choice (4)Response

a.

Nylon

b.

Teflon

c.

PVC

d.

Polythene

Question number: 500

» 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.

A natural fibre used for making linen cloth is obtained from a plant called

Choices

Choice (4)Response

a.

Jute

b.

Flax

c.

Coconut

d.

Cotton

Question number: 501

» Synthetic Fibres and Plastics

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MCQ▾

Question

Options are given in the jumbled form. Reshuffle the spellings and identify the correct options.

The source of rayon

Choices

Choice (4)Response

a.

kilsrowm

b.

totonc

c.

dowuplop

d.

lisptac

Question number: 502

» Synthetic Fibres and Plastics

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MCQ▾

Question

Plastic containers are used to pack food items like water, oil, pickles, milk dry food etc because

Choices

Choice (4)Response

a.

It is light weight and strong

b.

Plastic is non reactive with almost all chemicals.

c.

It is cheap and easy to handle

d.

None of the above

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