NSO Level 1- Science Olympiad (SOF) Class 8: Questions 444 - 448 of 1076

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Question number: 444

» Metals and Non-Metals

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MCQ▾

Question

Metal used for making the filament in electric bulbs is

Choices

Choice (4)Response

a.

Mercury

b.

Tungsten

c.

Gold

d.

Copper

Question number: 445

» Metals and Non-Metals

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MCQ▾

Question

Normally metals are hard in nature. The metal which can be cut with a knife is

Choices

Choice (4)Response

a.

Copper

b.

Sodium

c.

Cadmium

d.

Aluminium

Question number: 446

» Synthetic Fibres and Plastics

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MCQ▾

Question

Plastic is widely used in place of metals in industry because

Choices

Choice (4)Response

a.

It is non-reactive with almost all chemicals.

b.

It is cheaper than metals

c.

It is more durable than metals

d.

All a. , b. and c. are correct

Question number: 447

» Metals and Non-Metals

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MCQ▾

Question

Mother gave Meena two small pouches containing iron fillings and coal and asked her to crush both to a fine powder. The result would be

Choices

Choice (4)Response

a.

She could make a fine powder of both.

b.

She could make a fine powder of coal but could not powder iron fillings.

c.

She could not make a fine powder of either coal or iron fillings.

d.

She could make a fine powder of iron fillings but could not powder coal

Question number: 448

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

Identify the polymers from its use

It is used to make parachute, ropes for trekking, bristles of tooth brush, seat belts, sleeping bags etc

Choices

Choice (4)Response

a.

PVC

b.

Teflon

c.

Nylon

d.

Polythene

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