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प्रश्न
Soda bottle bursts sometimes when it is opened during summer. Why?
उत्तर
- In a soda bottle, carbon dioxide gas is dissolved in water under pressure.
- The gas in the bottle expands.
- Hence, the pressure inside the bottle increases.
- Thus the bottle may burst in hot summer.
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संबंधित प्रश्न
What is nitrogen-fixation?
What are the two ways in which nitrogen fixation occurs?
Name the following:
The type of bacteria which directly absorb nitrogen from the air and converted soluble nitrates in the soil.
Name the following:
The product of respiration released in exhaled air, other than carbon dioxide.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The percentage of carbon dioxide in the air is between 0.2 to 0.4%.
What happens if the percentage of oxygen in the air reaches to 70%?
Classify the following.
( Dog, Cat, coconut tree, monkey, brinjal plant, papaya plant)
| Things which give out oxygen | Things which give out carbon dioxide |
Arrange the following statements in correct sequence
- Plants manufacture food by a process called photosynthesis.
- Plants require energy for their growth.
- Plants take in oxygen and release carbon dioxide just as animals.
- Plants take carbon dioxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.
- Such oxygen is available to animals and human beings for breathing.
- During this process, oxygen is released by plants.
Which gas is essential for burning?
Match the following
| 1. | Oxygen | a. | Carbon dioxide |
| 2. | Azote | b. | Nitrogen |
| 3. | Solvay process | c. | Vital life |
| 4. | Gun powder | d. | No life |
