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प्रश्न
Write ‘true’ or ‘false for the following;
The composition of air was discovered by Lavoisier.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
What are the two ways in which nitrogen fixation occurs?
Tick (√) the most appropriate answer.
A gas which dilutes the activity of oxygen in air is:
Air is a mixture of many _______.
Match the following.
| Nitrogen | Respiration in living animals |
| Oxygen | Fertilizer |
| Carbon dioxide | Refrigerator |
| Dry ice | Fire extinguisher |
Write about the reaction of nitrogen with non metals.
______ is the main component of air.
Tri oxygen molecule is known as ______.
______ gas is essential for the proper growth of all plants.
Assertion: Carbon dioxide occurs as carbonates in nature.
Reason: Carbon dioxide can exist as a liquid at atmospheric pressure.
