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प्रश्न
Name three different appliances where air is utilized.
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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
Suggest five measures to prevent air pollution.
Fill in the blank :
________ is the most abundant inert gas present in air.
Fill in the blank
The supporter of combustion in air is _____.
State the utility of oxygen for respiration in plants
Name the following:
The main, rare (inert) gas present in air.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The percentage of carbon dioxide in the air is between 0.2 to 0.4%.
Tabulate the various components of air, including the components with variable composition.
The constituent of air that supports combustion is _____.
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 |
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Nitrogen
