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Question
Fill in the blank
Polluted air is harmful to ____.
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Solution
Polluted air is harmful to health.
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RELATED QUESTIONS
Give two uses of the following component present in air:
water vapour
How is air useful to scooters and cars.?
Name two air pollutants which cause global warming.
Fill in the blank
Air is a ______ of gases
Write ‘true’ or ‘false for the following;
Air is a compound.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
Why is it said that-
Air is a homogeneous mixture of various gases.
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. The constituent of air which is around 0.02% | A: Nitrogen |
| 2. The constituent of air which is inert or unreactive | B: Oxygen |
| 3. The constituent of air which is non-combustible, but supports combustion. |
C: Sulphur dioxide |
| 4. A pollutant in air responsible for acid rain | D: Carbon dioxide |
| 5. The main rare gas present in air. | E: Argon |
Fill in the blank:
Nitrogen of the air is utilized by plants for formation of _____.
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
