NSO Level 1- Science Olympiad (SOF) Class 8: Questions 489 - 494 of 1076

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Question number: 489

» Synthetic Fibres and Plastics

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MCQ▾

Question

We are familiar with the four R’s used in environment protection. Identify the R used in the situations

Ravi donates his old clothes, winter wear, school bag, text books, shoes and toys to the orphanage in the city

Choices

Choice (4) Response

a.

Reduce

b.

Recover

c.

Reuse

d.

Recycle

Question number: 490

» Synthetic Fibres and Plastics

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MCQ▾

Question

Plastic is a synthetic material which catches fire easily but the fire proof uniforms of firemen are made of melamine which is a form of plastic. The explanation to this statement is

Choices

Choice (4) Response

a.

It is a poor conductor of electricity

b.

It do not catch fire when exposed to flame.

c.

Melamine is a thermosetting plastic.

d.

It do not get deformed when exposed to heat

Question number: 491

» Synthetic Fibres and Plastics

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MCQ▾

Question

The uses of some materials are given in the statement. Identify them

A polymer used for making ropes.

Choices

Choice (4) Response

a.

Polyester

b.

Nylon

c.

Polythene

d.

PVC

Question number: 492

» Synthetic Fibres and Plastics

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MCQ▾

Question

The uses of some materials are given in the statement. Identify them

A polymer used for making disposable glasses and plates is

Choices

Choice (4) Response

a.

Thermocol

b.

Melamine

c.

Wax paper

d.

Teflon

Question number: 493

» Metals and Non-Metals

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MCQ▾

Question

Which of the following can be made in to wires?

Choices

Choice (4) Response

a.

Carbon

b.

Mercury

c.

Copper

d.

Sulphur

Question number: 494

» Synthetic Fibres and Plastics

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MCQ▾

Question

A material which gets decomposed easily by the action of microbes is called

Choices

Choice (4) Response

a.

Degradable substance

b.

Non-biodegradable substance

c.

Biodegradable substance

d.

Question does not provide sufficient data or is vague

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