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Air Around Us Class 6 MCQs Questions with Answers
I. Choose the correct option.
Question 1.
What are the properties of air?
(a) It occupies space
(b) It is present everywhere around us
(c) It has no colour and is transparent
(d) All of the above
Answer
Answer: (d) All of the above
Question 2.
Moving air is called
(a) dust
(b) smoke
(c) wind
(d) nitrogen
Answer
Answer: (c) wind
Question 3.
Properties of oxygen gas is
(a) colourless
(b) tasteless
(c) odourless
(d) all of these
Answer
Answer: (d) all of these
Question 4.
The composition of nitrogen gas in the atmosphere is
(a) 21%
(b) 78%
(c) 1%
(d) 0.01%
Answer
Answer: (b) 78%
Question 5.
Oxygen is a supporter of
(a) combustion
(b) nitrogen
(c) smoke
(d) dust
Answer
Answer: (a) combustion
Question 6.
Smoke is produced mainly by burning
(a) wood
(b) coal
(c) kerosene
(d) all of these
Answer
Answer: (d) all of these
Question 7.
The two gases which together make up about 99 per cent of the air are
(a) nitrogen and carbon dioxide
(b) nitrogen and ozone
(c) nitrogen and oxygen
(d) carbon dioxide and oxygen
Answer
Answer: (c) nitrogen and oxygen
Question 8.
Air is considered to be
(a) a compound
(b) a mixture
(c) an element
(d) a solvent
Answer
Answer: (b) a mixture
Question 9.
Wind does not help in the movement of
(a) firki
(b) weather cock
(c) ceiling fan
(d) sailing yacht
Answer
Answer: (c) ceiling fan
Question 10.
Envelope of air that surrounds the earth is known as
(a) biosphere
(b) atmosphere
(c) ecosystem
(d) environment
Answer
Answer: (b) atmosphere
Question 11.
Mountaineers carry oxygen cylinder with them because
(a) there is no oxygen on high mountains
(b) there is deficiency of oxygen on mountains at high altitude
(c) oxygen is used for cooking
(d) oxygen keeps them warm at low temperature
Answer
Answer: (b) there is deficiency of oxygen on mountains at high altitude
Question 12.
Air is present in
(a) atmosphere
(b) soil
(c) water
(d) everywhere
Answer
Answer: (d) everywhere
Question 13.
Which of the following gas is used for breathing?
(a) Carbon dioxide
(b) Nitrogen
(c) Oxygen
(d) None of these
Answer
Answer: (c) Oxygen
Question 14.
Which components of air are harmful to living organisms?
(a) Nitrogen and oxygen
(b) Dust and smoke
(c) Oxygen and carbon dioxide
(d) Smoke and water vapour
Answer
Answer: (b) Dust and smoke
Question 15.
Weather cock shows the direction of moving ………….. of a place.
(a) air
(b) water
(c) smoke
(d) dust
Answer
Answer: (a) air
II. Fill in the Blanks
Question 1.
One of the component of air used to manufacture fertilisers on a large scale is ………………..
Answer
Answer: nitrogen
Question 2.
Air is a ……………….. of gases.
Answer
Answer: mixture
Question 3.
……………….. is the layer of air around the earth.
Answer
Answer: Atmosphere
Question 4.
Major part of air is constituted by ………………..
Answer
Answer: nitrogen
Question 5.
……………….. gas helps in burning.
Answer
Answer: Oxygen
Question 6.
Gas that is commonly used in fire extinguisher is ………………..
Answer
Answer: carbon dioxide
Question 7.
……………….. air is used in tyres of vehicles.
Answer
Answer: Compressed
Question 8.
Plants along road side are mostly covered with ………………..
Answer
Answer: dust
Question 9.
……………….. portion of air is nitrogen.
Answer
Answer: 3/4th
Question 10.
Aquatic animals use dissolved ……………….. in water for respiration.
Answer
Answer: oxygen
Question 11.
Oxygen helps in breaking down the digested food in the body to release ……………….. gas.
Answer
Answer: carbon dioxide
Question 12.
Oxygen gas is ……………….. in water.
Answer
Answer: soluble
Question 13.
Air is ………………..
Answer
Answer: transparent
Question 14.
……………….. gas is vital for life.
Answer
Answer: Oxygen
Question 15.
……………….. gas does not support burning and cause suffocation if present in abundant.
Answer
Answer: Carbon dioxide
III. True or False
Question 1.
We can see and feel air.
Answer
Answer: False
Question 2.
Air is a mixture of gases.
Answer
Answer: True
Question 3.
Open areas allow air to move here and there.
Answer
Answer: True
Question 4.
We breathe in CO2
Answer
Answer: False
Question 5.
Process of preparation of food by green plants is known as photosynthesis.
Answer
Answer: True
Question 6.
Air in motion is called wind.
Answer
Answer: True
Question 7.
Plants do not respire.
Answer
Answer: False
Question 8.
The major part of air is nitrogen.
Answer
Answer: True
Question 9.
Oxygen constitutes 21% of the air.
Answer
Answer: True
Question 10.
We use oxygen gas for respiration.
Answer
Answer: True
Question 11.
Nitrogen gas helps in combustion.
Answer
Answer: False
Question 12.
Oxygen is soluble in water.
Answer
Answer: True
Question 13.
Traffic policeman wears mask to prevent inhalation of dust particles.
Answer
Answer: True
Question 14.
Presence of dust particles in air varies from place to place and time to time.
Answer
Answer: True
Question 15.
Air is found at certain places in the atmosphere only.
Answer
Answer: False
IV. Match the following
| Column I | Column II |
| 1. Nitrogen | (a) Respiration |
| 2. Mixture of gases | (b) Thin layer of air surrounding the earth |
| 3. Oxygen | (c) Use wind power to rotate |
| 4. Atmosphere | (d) 78% |
| 5. Windmill | (e) Released in respiration |
| 6. Carbon dioxide | (f) Air |
| 7. Smoke | (g) Colourless, transparent |
| 8. Air | (h) Harmful |
| 9. Compressed air | (i) Used to fill tyres |
Answer
Answer:
| Column I | Column II |
| 1. Nitrogen | (d) 78% |
| 2. Mixture of gases | (f) Air |
| 3. Oxygen | (a) Respiration |
| 4. Atmosphere | (b) Thin layer of air surrounding the earth |
| 5. Windmill | (c) Use wind power to rotate |
| 6. Carbon dioxide | (e) Released in respiration |
| 7. Smoke | (h) Harmful |
| 8. Air | (g) Colourless, transparent |
| 9. Compressed air | (i) Used to fill tyres |
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