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प्रश्न
What are the two necessary conditions for rusting of iron?
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उत्तर
Conditions for rusting:
- Presence of moisture (water).
- Presence of oxygen (air).
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संबंधित प्रश्न
Fill in the blank :
________ is the most abundant inert gas present in air.
Give reason:
A burning candle stops burning if covered with a glass tumbler
Name the following:
The product of respiration released in exhaled air, other than carbon dioxide.
What is the percentage of nitrogen in air?
What is the source of carbon dioxide in air?
Match the following
| 1. | Moving Air | Photosynthesis |
| 2. | Layer in which we live | Troposphere |
| 3. | Stratosphere | Wind |
| 4. | Oxygen | Ozone layer |
| 5. | carbon-di-oxide | Combustion |
How will you show that air is dissolved in water?
Air contains a small amount of CO2, Water vapour, and some other gases like ______, etc.
What is not true about air?
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
A weather cock shows the ______ in which the air is moving at that place.
