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प्रश्न
Fill in the blank:
_____________ discovered the oxygen gas.
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उत्तर
Joseph Priestley discovered the oxygen gas.
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संबंधित प्रश्न
How is air useful to scooters and cars.?
Name two air pollutants which affect our health.
What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
Describe a simple experiment with the help of a diagram to show that Air is highly compressible
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 ______.
Mention two advantages of wind energy.
The process of conversion of iron into hydrated form of oxides is called _______.
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
In a number of musical instruments, air plays an important role. Can you name some such instruments?
