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प्रश्न
Define rusting?
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उत्तर
Rusting: Slow conversion of iron into its hydrated oxide in the presence of moisture and air is called rusting.
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संबंधित प्रश्न
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 observeation balloons. | (b) Carbonic acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphuric acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
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Fill in the blank:
_____________ discovered the oxygen gas.
What do you observe when Carbon dioxide gas is passed through lime water.
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Tick (√) the correct alternative from the choice given for the following statement.
Photosynthesis is a process in which plants
Tick (√) the correct alternative from the choice given for the following statement.
The substance which accelerates the speed of a reaction without itself undergoing any change is called
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
