NSO Level 1- Science Olympiad (SOF) Class 8: Questions 620 - 624 of 1175

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Question 620

Question

MCQ▾

Animals which lay eggs are called

Choices

Choice (4)Response

a.

Oviparous

b.

Amphibians

c.

Viviparous

d.

Reptiles

Question 621

Question

MCQ▾

Shyam was cooking potato curry on a chulha. To his surprise, he observed that the copper vessel was getting blackened from outside. It may be due to:

Choices

Choice (4)Response

a.

Proper combustion of fuel

b.

Improper combustion of the fuel

c.

Burning of copper vessel

d.

Improper cooking of potato curry

Question 622

Question

MCQ▾

Carbon dioxide gas is a more effective fire extinguisher than water. The possible reason is

Choices

Choice (4)Response

a.

Carbon dioxide forms a blanket around the fire preventing the passage of oxygen

b.

Water is a good conductor of electricity

c.

It is denser than oil

d.

All a., b. and c. are correct

Question 623

Question

MCQ▾

The lowest temperature at which a combustible substance catches fire is called its

Choices

Choice (4)Response

a.

Freezing point

b.

Melting point

c.

Ignition temperature

d.

Boiling point

Question 624

Question

MCQ▾

Aluminium is used in making aeroplanes. The properties of aluminium which makes it suitable for this purpose is/are

Choices

Choice (4)Response

a.

Malleable

b.

High resistance to corrosion

c.

It is light in weight

d.

All a., b. and c. are correct

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