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प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Enamelling is the process of baking a mixture of silicates on the surface of aluminium at a high temperature.
पर्याय
True
False
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उत्तर
False.
Enamelling is the process of baking a mixture of silicates on the surface of iron at a high temperature.
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संबंधित प्रश्न
Briefly state the importance of Carbon dioxide.
Name and briefly explain four ways by which pollution of air caused by humans is minimised.
Classify Carbon dioxide. Also give a balanced equation to prepare it.
Compare respiration and combustion-both involving oxygen of the air.
Match the following.
| Nitrogen | Respiration in living animals |
| Oxygen | Fertilizer |
| Carbon dioxide | Refrigerator |
| Dry ice | Fire extinguisher |
Which gas in the atmosphere is essential for respiration?
Match the following:
| 1. | More industrial cities | a. | dust particles |
| 2. | Coastal areas | b. | Humidity |
| 3. | Rainy season | c. | Carbon dioxide |
| 4. | Windy places | d. | water vapour |
The composition of air changes slightly from place to place. Give examples.
Venus's atmosphere consists of roughly 96 – 97% of ______.
Nitrogen gas is so cold that moisture in the air condenses on it, creating a dense fog.
