NSO Level 1- Science Olympiad (SOF) Class 8: Questions 620 - 624 of 1076

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Question number: 620

» Reproduction in Animals

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MCQ▾

Question

Animals which lay eggs are called

Choices

Choice (4)Response

a.

Oviparous

b.

Amphibians

c.

Viviparous

d.

Reptiles

Question number: 621

» Combustion and Flame

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MCQ▾

Question

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 number: 622

» Combustion and Flame

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MCQ▾

Question

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 number: 623

» Combustion and Flame

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MCQ▾

Question

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 number: 624

» Metals and Non-Metals

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MCQ▾

Question

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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