Check the below NCERT MCQ Questions for Class 6 Science Chapter 15 Air Around Us with Answers Pdf free download. MCQ Questions for Class 6 Science with Answers were prepared based on the latest exam pattern. We have provided Air Around Us Class 6 Science MCQs Questions with Answers to help students understand the concept very well.
You can refer to NCERT Solutions for Class 6 Science Chapter 15 Air Around Us to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Air Around Us Class 6 MCQs Questions with Answers
Choose the correct option in the following questions:
Question 1.
Major part of the air is constituted by
(a) nitrogen
(b) oxygen
(c) carbon dioxide
(d) inert gases
Answer
Answer: (a) nitrogen
Explanation:
3/4th portion of air is nitrogen.
Question 2.
Which of the following gas helps in burning? ,
(a) Nitrogen
(b) Oxygen
(c) Carbon dioxide
(d) Carbon monoxide
Answer
Answer: (b) Oxygen
Explanation:
Oxygen does not bum but supports burning.
Question 3.
Which of the following gas we use in breathing?
(a) Carbon dioxide
(b) Nitrogen
(c) Oxygen
(d) None of these
Answer
Answer: (c) Oxygen
Explanation:
We use oxygen and produce carbon dioxide.
Question 4.
Wind is
(a) air around us
(b) rising hot air
(c) air in motion
(d) none of these
Answer
Answer: (c) air in motion
Explanation:
Air in motion is called wind.
Question 5.
Air is present in
(a) atmosphere
(b) soil
(c) water of ponds, lakes and seas
(d) everywhere
Answer
Answer: (d) everywhere
Explanation:
Air is present everywhere.
Question 6.
Air is
(a) a mixture
(b) a pure substance
(c) an element
(d) anything, that depends on the place where it is found
Answer
Answer: (a) a mixture
Explanation:
Air is a mixture of various gases, water vapours and dust particles.
Question 7.
Envelope of air that surrounds the earth is known as
(a) biosphere
(b) atmosphere
(c) environment
(d) ecosystem
Answer
Answer: (b) atmosphere
Explanation:
Air is all around us, a thick layer of air surrounds the earth, this blanket of air is called atmosphere.
Question 8.
Which is not a property of air?
(a) It occupies space.
(b) It is transparent,
(c) It is a solution.
(d) It is a compound.
Answer
Answer: (d) It is a compound.
Explanation:
Air is a homogeneous solution, which occupies space and it is transparent. So air is not a compound.
Question 9.
The ratio of nitrogen to oxygen in the air is
(a) 1:4
(b) 4:1
(c) 3:1
(d) 1:2
Answer
Answer: (b) 4:1
Explanation:
4:1 is the ratio of nitrogen to oxygen in the air.
Question 10.
The main constituent of the air is.
(a) nitrogen
(b) oxygen
(c) carbon dioxide
(d) hydrogen
Answer
Answer: (a) nitrogen
Explanation:
Composition of air (Percentage by volume), nitrogen = 78.03, oxygen = 20.99, carbon dioxide = 0.03, noble gases = 0.95 and some water vapours, dust particles and other impurities.
Match the following items given in Column A with that in Column B:
Column A | Column B |
(a) Air | (i) Thin layer of air surrounding our earth. |
(b) Wind | (ii) Released in respiration. |
(c) Atmosphere | (iii) Makes three fourth part of total air. |
(d) Oxygen | (iv) Is process of burning of food to get energy. |
(e) Carbon dioxide | (v) Uses wind power to rotate. |
(f) Nitrogen | (vi) Process of preparation of food by green plants. |
(g) Respiration | (vii) Allow air to move here and there. |
(h) Photosynthesis | (viii) Is a gaseous mixture. |
(i) Windmill | (ix) Supports combustion. |
(j) Open areas | (x) Is air in motion. |
Answer
Answer:
Column A | Column B |
(a) Air | (viii) Is a gaseous mixture. |
(b) Wind | (x) Is air in motion. |
(c) Atmosphere | (i) Thin layer of air surrounding our earth. |
(d) Oxygen | (ix) Supports combustion. |
(e) Carbon dioxide | (ii) Released in respiration. |
(f) Nitrogen | (iii) Makes three fourth part of total air. |
(g) Respiration | (iv) Is process of burning of food to get energy. |
(h) Photosynthesis | (vi) Process of preparation of food by green plants. |
(i) Windmill | (v) Uses wind power to rotate. |
(j) Open areas | (vii) Allow air to move here and there. |
Fill in the blanks with the appropriate Words.
1. When air is in ………………. it is called wind.
Answer
Answer: motion
2. Air has no ……………. and one can see through it. It is ………………… .
Answer
Answer: colour, transparent
3. Air is really not one substance but a ……………………. .
Answer
Answer: mixture
4. Air contains ………………… particles.
Answer
Answer: dust
5. The component of air that supports burning is called …………………… .
Answer
Answer: oxygen
6. The oxygen helps in breaking down the digested food in the body to release the …………………….. .
Answer
Answer: energy
7. Our earth is surrounded by ……………………….. .
Answer
Answer: air
8. Initial drops of first rain bring a lot of …………………… along with them.
Answer
Answer: dirt
9. The aquatic animals use dissolved oxygen in water for respiration. This is possible because oxygen is ………………… in water.
Answer
Answer: soluble
10. Nitrogen of the air is used on a large scale to manufacture ………………………. .
Answer
Answer: fertilizers
11. Air is present in, atmosphere, water and ……………….. .
Answer
Answer: soil
12. The method of separating two components of a mixture which is based on the wind is …………………….. .
Answer
Answer: winnowing
13. ……………………. air is used in tyres of vehicles.
Answer
Answer: Compressed
14. …………………. is the place in nature for gaseous exchange.
Answer
Answer: Atmosphere
State whether the statements given below are True or False:
1. We cannot see air.
Answer
Answer: True
2. Air is a compound and not an element.
Answer
Answer: False
3. A firki rotates only in an open area or in a closed room with the ceiling fan switched on.
Answer
Answer: True
4. Open areas allow air to move here and there.
Answer
Answer: True
5. Air is an opaque material.
Answer
Answer: False
6. All living organisms require air for their survival.
Answer
Answer: True
7. Air contains water vapours.
Answer
Answer: True
8. We breath in CO2 and breath out O2.
Answer
Answer: False
9. A policeman, controlling the traffic wears a mask to prevent the dust particles from entering his respiratory system through breathing.
Answer
Answer: True
10. Air is necessary for burning things.
Answer
Answer: True
11. The major part of air is nitrogen.
Answer
Answer: True
12. Air becomes thinner and thinner as we go higher and higher from the surface of earth.
Answer
Answer: True
13. Plants produce oxygen through photosynthesis.
Answer
Answer: True
14. Plants do not respire.
Answer
Answer: False
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