Advertisements
Advertisements
Question
Name the important scientists and their studies which led to the discovery of the components of air.
Solution
Discovery of air:
- John Mayow (1674) proved air has two components – active and inactive components.
- Lavoisier (1789) named active component as oxygen and inactive component as nitrogen
- Other scientists (1800’s) discovered noble gases, C02, water vapours.
APPEARS IN
RELATED QUESTIONS
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
How is greenhouse effect produced?
Match the statements in Column A, with those in Column B.
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. |
(a) Oxygen |
| 2. A gas used for filling weather observation balloons. | (b) carbon acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphur acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
Fill in the blank
Air is a ______ of gases
Tick (√) the correct alternative from the choice given for the following statement.
Air pollution is due to the
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
Describe a simple experiment with the help of a diagram to show that Air is highly compressible
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
What should be done if the clothes of a person catch fire accidentally? Why?
The process of conversion of iron into hydrated form of oxides is called _______.
