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प्रश्न
Fill in the blank
Polluted air is harmful to ____.
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उत्तर
Polluted air is harmful to health.
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संबंधित प्रश्न
Match the statements in Column A, with those in Column B.
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (a) Oxygen |
| 2. A gas used for filling weather observeation balloons. | (b) Carbonic acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphuric acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
State two similarities and two differences between respiration and burning.
How is air useful to windmills?
What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
Describe a simple experiment with the help of a diagram to show that Air occupies space
Describe a simple experiment with the help of a diagram to show that Air is highly compressible
Name the following.
Gases that are harmful to the ozone layer
Draw a neat labelled diagram for the following experiment.
To prove that oxygen is non-combustible, but supports combustion.
The process of conversion of iron into hydrated form of oxides is called _______.
What is global warming?
