Advertisements
Advertisements
प्रश्न
Answer in your own words.
What are the various constituents of air? Write their uses.
Advertisements
उत्तर
| Constituents of air | Uses |
| 1. Nitrogen | Required in building proteins. Useful in the production of ammonia. Used in airtight packaging of food products. |
| 2. Oxygen | Necessary for respiration and combustion. |
| 3. Carbon dioxide | Used by plants to make their food. Used in fire extinguishers. |
| 4. Argon | Used in electric bulbs. |
| 5. Helium |
Used for obtaining low temperatures. |
| 6. Neon | Used in decorative lights and street lighting. |
| 7. Krypton | Used in fluorescent tubes. |
| 8. Xenon | Used in flash photography. |
संबंधित प्रश्न
Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
Define rusting?
Tick (√) the correct alternative from the choice given for the following statement.
The gases which cause acid rain are
Describe a simple experiment with the help of a diagram to show that Air has mass
What will happen if the number of vehicles and factories in your surroundings increases?
Name the following.
Inert gases in the air
______ soil has pH 7.
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
Mention two advantages of wind energy.
What should be done if the clothes of a person catch fire accidentally? Why?
