NSO Level 1- Science Olympiad (SOF) Class 8: Questions 490 - 494 of 1175

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Question 490

Question

MCQ▾

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 491

Question

MCQ▾

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 492

Question

MCQ▾

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 493

Question

MCQ▾

Which of the following can be made in to wires?

Choices

Choice (4)Response

a.

Carbon

b.

Mercury

c.

Copper

d.

Sulphur

Question 494

Question

MCQ▾

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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