Class 6 Science Chapter 11 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 11. 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 11 MCQ Online Test for 2024-25

Class: 6Science
Chapter: 11Air Around Us
Contents:MCQ Online Test with Answers

Class 6 Science Chapter 11 MCQ Test with Answers

Q1

Naveen took an empty plastic bottle, turned it upside down, and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations. Which observation(s) is/are correct?

[A]. Bubbles of air came out from the bottle and Some water entered into the bottle.
[B]. No Bubbles formed, only water entered into the bottle.
[C]. Nitrogen gas came out in the form of bubbles and oxygen gas dissolved in water and no Bubbles formed, only water entered into the bottle.
[D]. Bubbles of air came out from the bottle.
Q2

The earthworms come out of the soil only during:

[A]. Very cold weather
[B]. Very hot weather
[C]. Very heavy rains
[D]. Very little rains
Q3

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
Q4

Read the following sentences carefully, and choose the incorrect one:

[A]. The little dissolved oxygen present in sea water cannot be used for breathing by human beings such as a diver.
[B]. The process of burning of a substance is called combustion.
[C]. Whether we say that air is necessary for burning or oxygen is necessary for burning, it means the same thing.
[D]. If burning coal is covered with a vessel it continues burning.
Q5

Vikash is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

[A]. Plant and animal matter burns by consuming oxygen from air and produces mainly carbon dioxide and a few other gases.
[B]. Green plants need carbon dioxide gas to make food.
[C]. The presence of water vapour in air is important for the working of water cycle in nature.
[D]. All the above
Q6

Shreya is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Shreya wants to take help from you:

[A]. Smoke is produced by the burning of fuels.
[B]. The tall chimneys in factories are installed to take the smoke produced in the factory high up in the air.
[C]. The traffic policemen wear masks to protect themselves from the smoke containing harmful gases.
[D]. We should breathe in air or inhale air through our mouth.
Q7

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
Q8

In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were correct? Will you be able to answer this question?

[A]. The oxygen of air being consumed by animals in the respiration and in the burning of fuels is constantly being replaced by plants through the process of photosynthesis.
[B]. Animal depends on plants for getting oxygen gas and plants depend on animals for getting carbon dioxide gas.
[C]. The plants and animals help in maintaining the balance of oxygen and carbon dioxide gases in atmosphere.
[D]. All the above.
Q9

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.
Q10

Which of the following components of air is present in the largest amount in the atmosphere?

[A]. Nitrogen
[B]. Oxygen
[C]. Water vapour
[D]. Carbon dioxide
Q11

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
Q12

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

[A]. Firki
[B]. Weather cock
[C]. Celling fan
[D]. Sailing yacht
Q13

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.
Q14

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

[A]. Weather cock is a device which shows the direction in which the air is moving or blowing at a place.
[B]. Air transparent so we can see through it.
[C]. An empty bottle is not exactly empty it contains air in it.
[D]. All the above
Q15

Aditi is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Aditi wants to take help from you:

[A]. Air is a mixture of several two gases.
[B]. No living things can survive without air.
[C]. Moving air is called wind.
[D]. It is the moving air or blowing air which makes a phirki rotate.
Q16

The components of air which is utilized by the plants in respiration is:

[A]. Nitrogen
[B]. Carbon dioxide
[C]. Oxygen
[D]. Water vapour
Q17

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
Q18

About one-fifth of ordinary air is:

[A]. Nitrogen
[B]. Carbon dioxide
[C]. Water vapour
[D]. Oxygen
Q19

Nitrogen is needed by the plants to make:

[A]. Fats
[B]. Carbohydrates
[C]. Proteins
[D]. Minerals
Q20

Air is considered to be:

[A]. A compound
[B]. A mixture
[C]. A solvent
[D]. An element
Q21

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
Q22

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
Q23

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
Q24

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

[A]. Food
[B]. Fuel
[C]. Carbon dioxide
[D]. Oxygen
Q25

If the clothes of a person catch fire while working in the kitchen, which of the following should be used to cover the burning clothes of a person so as to extinguish fire?

[A]. Nylon blanket
[B]. Woolen blanket
[C]. Terylene blanket
[D]. Polythene sheet

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Last Edited: April 21, 2023