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
Question 2.
Which of the following gas helps in burning? ,
(a) Nitrogen
(b) Oxygen
(c) Carbon dioxide
(d) Carbon monoxide
Answer
Question 3.
Which of the following gas we use in breathing?
(a) Carbon dioxide
(b) Nitrogen
(c) Oxygen
(d) None of these
Answer
Question 4.
Wind is
(a) air around us
(b) rising hot air
(c) air in motion
(d) none of these
Answer
Question 5.
Air is present in
(a) atmosphere
(b) soil
(c) water of ponds, lakes and seas
(d) everywhere
Answer
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
Question 7.
Envelope of air that surrounds the earth is known as
(a) biosphere
(b) atmosphere
(c) environment
(d) ecosystem
Answer
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
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
Question 10.
The main constituent of the air is.
(a) nitrogen
(b) oxygen
(c) carbon dioxide
(d) hydrogen
Answer
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
Fill in the blanks with the appropriate Words.
1. When air is in ………………. it is called wind.
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2. Air has no ……………. and one can see through it. It is ………………… .
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3. Air is really not one substance but a ……………………. .
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4. Air contains ………………… particles.
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5. The component of air that supports burning is called …………………… .
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6. The oxygen helps in breaking down the digested food in the body to release the …………………….. .
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7. Our earth is surrounded by ……………………….. .
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8. Initial drops of first rain bring a lot of …………………… along with them.
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9. The aquatic animals use dissolved oxygen in water for respiration. This is possible because oxygen is ………………… in water.
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10. Nitrogen of the air is used on a large scale to manufacture ………………………. .
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11. Air is present in, atmosphere, water and ……………….. .
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12. The method of separating two components of a mixture which is based on the wind is …………………….. .
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13. ……………………. air is used in tyres of vehicles.
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14. …………………. is the place in nature for gaseous exchange.
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State whether the statements given below are True or False:
1. We cannot see air.
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2. Air is a compound and not an element.
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3. A firki rotates only in an open area or in a closed room with the ceiling fan switched on.
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4. Open areas allow air to move here and there.
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5. Air is an opaque material.
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6. All living organisms require air for their survival.
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7. Air contains water vapours.
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8. We breath in CO2 and breath out O2.
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9. A policeman, controlling the traffic wears a mask to prevent the dust particles from entering his respiratory system through breathing.
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10. Air is necessary for burning things.
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11. The major part of air is nitrogen.
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12. Air becomes thinner and thinner as we go higher and higher from the surface of earth.
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13. Plants produce oxygen through photosynthesis.
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14. Plants do not respire.
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We hope the given NCE
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