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प्रश्न
The components of air which are harmful to living beings are ______.
विकल्प
nitrogen and carbon dioxide.
dust and water vapour.
dust and smoke.
smoke and water vapour.
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उत्तर
The components of air which are harmful to living beings are dust and smoke.
Explanation:
Dust and smoke are harmful to living beings because if they enter our body, they can cause respiratory problems.
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संबंधित प्रश्न
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Sulphur dioxide gas dissolves in water to form ___________ acid.
Give reason:
Aquatic animals and plants are able to survive in the matter.
Fill in the blank
Green plants need ________________to prepare food.
State a reason why there is a balance in the amount of carbon dioxide in the air, even though carbon dioxide is released into the atmopshere by various processes.
Explain why mountaineers carry oxygen cylinders with them?
Air is a mixture of many _______.
______ gas is given to the patients having breathing problems.
The amount of water vapour in the air is more in windy places than in other areas.
Give the components present in the air with a percentage?
Match the following
| 1. | Nitrogen | a. | Acid rain |
| 2. | CO2 | b. | Global warming |
| 3. | Melting of glaciers | c. | Volcanic gases |
| 4. | Corrosion of bridges | d. | Aerated drinks |
