Class 6 Science Chapter 15 MCQ (Multiple Choice Questions) of Air Around Us. All the MCQ are taken from important topics given in NCERT Book’s Chapters of class 6 Science chapter 15. Class 6 Science extra questions are helpful for the preparation of school unit tests and periodic exams. Revise the complete chapter using these MCQ objective questions and get confident in exams.

Class 6 Science Chapter 15 MCQ Online Test for 2022-2023

Class: 6Science
Chapter: 15Air Around Us
Contents:MCQ Online Test with Answers

Class 6 Science Chapter 15 MCQ Test with Answers

Q1

Which of the following statement is or are correct?

[A]. Nitrogen gas is not essential for breathing or respiration.
[B]. All the living things need nitrogen compounds for their growth.
[C]. Nitrogen is needed by plants to make proteins.
[D]. All the above
Q2

Mountaineers carry oxygen cylinders with them because:

[A]. There is no oxygen on high mountains
[B]. There is deficiency of oxygen on mountains at higher altitude
[C]. Oxygen is used for cooking
[D]. Oxygen keeps them warm at low temperature
Q3

Consider the following statements and choose the incorrect one:

[A]. Oxygen gas is essential for breathing or respiration.
[B]. Oxygen or air is not necessary for the purpose of burning or combustion of fuels.
[C]. The animals and plants living on land take the oxygen required for breathing from the air around them.
[D]. The animals and plants living in water take the oxygen required for breathing from the air dissolved in water.
Q4

Priya is writing some statements, choose the correct statement and help him:

[A]. When a burning candle is covered with a gas jar, the supply of oxygen of fresh air is cut off and it stops burning.
[B]. When the burning clothes of a person are covered with woolen blanket, then the supply of fresh air is cut off and hence the clothes stops burning.
[C]. Oxygen gas is given to patient in hospitals who gave have difficulty in breathing properly.
[D]. All the above
Q5

State which of the following statements are incorrect:

[A]. Plants consume oxygen for respiration.
[B]. Plants produce oxygen during the process of making their own food.
[C]. Air helps in the movements of sailing yachts and glider but plays no role in the flight of birds and aeroplanes.
[D]. Air does occupy space.
Q6

David appeared in class test but he confused to know the correct statement. Would you help him to know that?

[A]. Air is used by human beings for breathing and respiration.
[B]. Air is used for burning fuels (like wood, coal and kerosene etc.) to make fire.
[C]. Compressed air is used to fill tyres of various kinds of vehicles.
[D]. All the above
Q7

Pooja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:

[A]. Our earth is surrounded by a thin layer of air.
[B]. The presence of water vapour in air is important for the water cycle in nature.
[C]. The major part of air which support burning candle, is oxygen and nitrogen.
[D]. When the water is poured on the lump of soil, it displaces the air which is seen in the form of bubbles.
Q8

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. Air do not help in the dispersal of seeds and pollen of flowers of several plants.
[B]. Air has no role for burning of phosphorus.
[C]. Air has no role for flying aeroplanes and helicopters.
[D]. All the above.
Q9

The components of air which are harmful to living beings are:

[A]. Nitrogen and carbon dioxide
[B]. Dust and water vapour
[C]. Dust and smoke
[D]. Smoke and water vapour
Q10

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. Blowing air, called wind, is used to turn the blades of windmills.
[B]. Air helps in the movement of yachts or sailing boats, parachutes, gliders and aeroplanes.
[C]. Air helps the birds, bats and insects in flying.
[D]. Air do not play an important role in the water cycle.
Q11

In a science quiz competition, Naina is asked a question where she had to choose the statement which was/were correct?

[A]. The animals which live inside the soil get oxygen for breathing from the air present between the soil particles.
[B]. The earthworms come out of the soil only during heavy rains.
[C]. Many animals living in soil dig burrows and holes deep into the soil.
[D]. All the above
Q12

Which of the following statement is or are correct?

[A]. The person who climb high mountains are called mountaineers.
[B]. The mountaineers carry oxygen gas cylinder with them while climbing high mountains.
[C]. If the clothes of a person catch fire woolen blanket is put around the burning clothes to extinguish the fire.
[D]. All the above
Q13

Wind does not help in the movement of which of the following?

[A]. Firki
[B]. Weather cock
[C]. Celling fan
[D]. Sailing yacht
Q14

Consider the following statements and choose the incorrect one:

[A]. Air is a mixture of many gases.
[B]. Nitrogen and oxygen gases taken together make up about 99% of air.
[C]. The envelope of air that surrounds the earth is called atmosphere.
[D]. The composition of air is always exactly the same.
Q15

The two gases which, taken together, make up about 99% of air:

[A]. Nitrogen and carbon dioxide
[B]. Nitrogen and Ozone
[C]. Carbon dioxide and oxygen
[D]. Nitrogen and oxygen
Q16

In an activity to show that air is mainly a mixture of two gases (nitrogen and oxygen), the carbon dioxide produced by the burning of candle in air is absorbed by dissolving a substance X in water in the trough. The substance X is:

[A]. Washing soda
[B]. Baking soda
[C]. Caustic soda
[D]. Soda water
Q17

About one-fifth of ordinary air is:

[A]. Nitrogen
[B]. Carbon dioxide
[C]. Water vapour
[D]. Oxygen
Q18

While deep under the sea, a deep-sea diver cannot utilize the oxygen dissolved in sea water for breathing because he does not have:

[A]. Thin skin
[B]. Gills
[C]. Stomata
[D]. Breathing tubes
Q19

Air is considered to be:

[A]. A compound
[B]. A mixture
[C]. A solvent
[D]. An element
Q20

The air over industrial cities has usually higher amount of one of the following components than normal air. This is:

[A]. Oxygen
[B]. Argon
[C]. Carbon dioxide
[D]. Nitrogen
Q21

The crop plants do not depend on humans for obtaining one of the following. This one is:

[A]. Fertilizers
[B]. Oxygen
[C]. Carbon dioxide
[D]. Irrigation
Q22

Which of the following is not a common component of air that we normally breathe in?

[A]. Oxygen
[B]. Water vapour
[C]. Carbon monoxide
[D]. Nitrogen
Q23

If we try to immerse an empty glass in a water container vessel (glass mouth towards bottom side but not touched the bottom), how will some air be release from that glass?

[A]. Pour more water into the basin.
[B]. Blow bubbles into the class.
[C]. Tilt the glass
[D]. Push the glass further down
Q24

How can we find out that there is air in a sponge?

[A]. Squeeze the sponge in air
[B]. Pour water into the sponge
[C]. Blow some air into the sponge
[D]. Squeeze the sponge in water
Q25

The humans do not depend on plants for one of the following. This one is:

[A]. Food
[B]. Fuel
[C]. Carbon dioxide
[D]. Oxygen

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