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प्रश्न
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
Mountaineers carry oxygen ______ with them, while climbing high mountains.
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उत्तर
Mountaineers carry oxygen cylinders with them while climbing high mountains.
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संबंधित प्रश्न
Statement given below is incorrect. Write the correct statement :
Symbiotic bacteria are present in nodules of cereal plants such as wheat.
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.
Fill in the blank
The supporter of combustion in air is _____.
_______ can be seen moving in a beam of sunlight in a dark room.
Nitrogen is essential for burning.
The air in coastal areas have more oxygen.
Match the following
| 1. | Nitrogen | a. | Acid rain |
| 2. | CO2 | b. | Global warming |
| 3. | Melting of glaciers | c. | Volcanic gases |
| 4. | Corrosion of bridges | d. | Aerated drinks |
Assertion: Carbon dioxide occurs as carbonates in nature.
Reason: Carbon dioxide can exist as a liquid at atmospheric pressure.
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.
Observe the picture given in figure carefully and answer the following questions.
- What is covering the nose and mouth of the police man?
- Why is he putting a cover on his nose?
- Can you comment on air quality of the place shown in the figure?
