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प्रश्न
How is air useful to scooters and cars.?
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उत्तर
Air filled tyres of cars move smoothly on road as there is less friction.
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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 the following:
Respiration
Mention five causes of air pollution.
Fill in the blank
Air is a ______ of gases
Write ‘true’ or ‘false for the following;
Air is a compound.
Tick (√) the correct alternative from the choice given for the following statement.
Rust is
Tick (√) the correct alternative from the choice given for the following statement.
The substance which accelerates the speed of a reaction without itself undergoing any change is called
Name the following.
Gases that are harmful to the ozone layer
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
Complete the statement given below by filling in the blank with the correct word/s from the word/s given below
____________ is an example of a pollutant present in the air.
