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प्रश्न
Discuss harmful effects of greenhouse effect.
उत्तर
Large amount of carbon-dioxide in the polluted air results in increase of greenhouse effect which has raised the average temperature of the Earth by 2°C. This results in global warming which, in turn, will melt ice on the polar caps, thereby raising the level of sea water by a few metres. This can result in submerging of coastal areas and islands causing excessive damage.
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संबंधित प्रश्न
Write the chemical name of Lime water
Fill in the blank
Although we cannot see air, we can ___it.
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
Tick (√) the correct alternative from the choice given for the following statement.
Photosynthesis is a process in which plants
______ soil has pH 7.
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 |
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
Cool and soothing wind: Breeze.
uproot trees wind: ______.
Make sentences using the given set of words.
Air, wind, motion, called
