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प्रश्न
How is air useful to agriculture?
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उत्तर
Air speeds up drying up of agricultural products like grains, pulses fruits, etc. Air helps in the pollination of flowers and dispersal of seeds.
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संबंधित प्रश्न
Give two uses of the following component present in air:
oxygen
Give two uses of the following component present in air:
nitrogen
Give two uses of the following component present in air:
carbon dioxide
Define the following:
Respiration
State two similarities and two differences between respiration and burning.
Tick (√) the correct alternative from the choice given for the following statement.
Rust is
Water does not have a ______ but has definite ______ and ______.
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. The constituent of air which is around 0.02% | A: Nitrogen |
| 2. The constituent of air which is inert or unreactive | B: Oxygen |
| 3. The constituent of air which is non-combustible, but supports combustion. |
C: Sulphur dioxide |
| 4. A pollutant in air responsible for acid rain | D: Carbon dioxide |
| 5. The main rare gas present in air. | E: Argon |
What is wind energy?
In a number of musical instruments, air plays an important role. Can you name some such instruments?
