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प्रश्न
Fill in the blank:
Rusting is a chemical reaction which involves _____ oxidation.
उत्तर
Rusting is a chemical reaction which involves slow oxidation.
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संबंधित प्रश्न
Give two uses of the following component present in air:
water vapour
Name two air pollutants which cause global warming.
What will happen if the number of vehicles and factories in your surroundings increases?
State the meaning of the term Atmosphere.
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 |
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
The composition of air is always exactly the same.
The layer of air around the earth is known as ______.
Wind does not help in the movement of which of the following?
Match the items of Column I with the items of Column II
| Column-I | Column-ll | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of airflow |
| (e) | Wind | (v) | Prevent dust particles |
