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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Air pollution is due to the
विकल्प
cutting of green plants
gases like carbon monoxide, sulphur dioxide, etc.
smoke given out by factories
all of the above
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उत्तर
all of the above
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संबंधित प्रश्न
Why can’t we see air?
Define the following:
Respiration
Define rusting?
Why is it said that-
Air is a homogeneous mixture of various gases.
Fill in the blank:
Rusting is a chemical reaction which involves _____ oxidation.
Draw a neat labelled diagram for the following experiment.
To prepare oxygen in the laboratory from hydrogen peroxide and a catalyst.
List five activities that are possible due to the presence of air.
Match the following:
| 1. | Layer of air | a. | Hand fan |
| 2. | Electrical energy | b. | 21% |
| 3. | Nitrogen | c. | Windmill |
| 4. | Oxygen | d. | Atmosphere |
| 5. | Palm Trees | e. | 78% |
Cool and soothing wind: Breeze.
uproot trees wind: ______.
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Why did the tiny bubbles appeared?
