Air Around Us-Composition of Air (CBSE (Central Board of Secondary Education- Board Exam) Class-6 Science): Questions 1 - 8 of 10

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Question number: 1

» Air Around Us » Composition of Air » Dust and Smoke

MCQ▾

Question

Sources of dust particles present in the air are:

Choices

Choice (4) Response

a.

Blowing of wind

AND

Traffic on the road

b.

Dusting at home, earth moving operations

c.

Construction activities and agricultural practices

d.

All a. , b. and c. are correct

Question number: 2

» Air Around Us » Composition of Air » Carbon Dioxide

MCQ▾

Question

The gas which helps to keep the earth warm is:

Choices

Choice (4) Response

a.

Oxygen

b.

Nitrogen

c.

Carbon-dioxide

d.

None of the above

Question number: 3

» Air Around Us » Composition of Air » Water Vapor

MCQ▾

Question

The amount of water vapour present in the air is known as:

Choices

Choice (4) Response

a.

Humidity

b.

Transpiration

c.

Evaporation

d.

Moisture

Question number: 4

» Air Around Us » Composition of Air » Carbon Dioxide

MCQ▾

Question

Gas used in fire extinguishers is:

Choices

Choice (4) Response

a.

Oxygen

b.

Carbon-dioxide

c.

Nitrogen

d.

All of the above

Question number: 5

» Air Around Us » Composition of Air » Dust and Smoke

MCQ▾

Question

Why the traffic policeman wears mask?

Choices

Choice (4) Response

a.

To protect themselves from UV rays

b.

To protect themselves from sun rays

c.

To protect themselves from smoke

d.

All of the above

Question number: 6

» Air Around Us » Composition of Air » Oxygen

MCQ▾

Question

Supporter of combustion is:

Choices

Choice (4) Response

a.

Carbon-dioxide

b.

Oxygen

c.

None of the above

d.

Question does not provide sufficient data or is vague

Question number: 7

» Air Around Us » Composition of Air » Oxygen

MCQ▾

Question

The gas which is used in respiration to break down the food to give energy is:

Choices

Choice (4) Response

a.

Oxygen

b.

Carbon-dioxide

c.

Nitrogen

d.

All of the above

Question number: 8

» Air Around Us » Composition of Air » Oxygen

MCQ▾

Question

Special situations in which oxygen cylinders are used are:

Choices

Choice (4) Response

a.

A patient having breathing difficulties

b.

A mountaineer climbing a high mountain

c.

A diver going into deep sea

d.

All a. , b. and c. are correct

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