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प्रश्न
Name the following:
The active component of air which supports combustion and is used up in burning
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उत्तर
Oxygen
संबंधित प्रश्न
What are the two ways in which nitrogen fixation occurs?
Tick (√) the most appropriate answer.
The presence of water vapour in air is essential for :
Tick (√) the most appropriate answer.
Which is not a polluting gas for the air?
Fill in the blank
Aquatic plants and animals use _________ in water.
You are given a test tube with two outlets and a bottle of lime water. Using same, how would you demonstrate experimentally the presence of carbon dioxide in air.
Classify the following.
( Dog, Cat, coconut tree, monkey, brinjal plant, papaya plant)
| Things which give out oxygen | Things which give out carbon dioxide |
The Scottish chemist ______ discovered carbon dioxide is present in air.
During respiration, carbon-di-oxide is exhaled out of the body through the ______.
Match the following
| 1. | Nitrogen | a. | Acid rain |
| 2. | CO2 | b. | Global warming |
| 3. | Melting of glaciers | c. | Volcanic gases |
| 4. | Corrosion of bridges | d. | Aerated drinks |
Make sentences using the given set of words.
99%, oxygen, nitrogen, air, together
