Advertisements
Advertisements
प्रश्न
Name three different appliances where air is utilized.
Advertisements
उत्तर
- Vehicles – Run on tyres which are inflated with air.
- Brake mechanisms – Of trains and other machines, work on compressed air.
- Pumps and siphons – Work on air pressure
संबंधित प्रश्न
Answer the question put against the following constituents of air :
Water vapours : Explain their role in modifying the earth’s climate.
Define the term Global warming.
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
Solution of carbon dioxide in water is called _________ acid.
Classify Calcium oxide. Also give a balanced equation to prepare it.
Write ‘True’ or ‘False’ in front of following statement.
Enamelling is the process of baking a mixture of silicates on the surface of aluminium at a high temperature.
Fill in the blank
Aquatic plants and animals use _________ in water.
Explain the importance of nitrogen of the air for plant growth.
Name the following:
The product formed when phosphorus burns in oxygen.
Match the following:
| 1. | More industrial cities | a. | dust particles |
| 2. | Coastal areas | b. | Humidity |
| 3. | Rainy season | c. | Carbon dioxide |
| 4. | Windy places | d. | water vapour |
Mountaineers carry oxygen cylinders with them because ______.
