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प्रश्न
List out the uses of carbon dioxide.
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उत्तर
- Carbon dioxide helps plants in photosynthesis.
- It is used in fire extinguishers.
- It is used in refrigerators as dry ice for cooling purpose.
- It is used to make plastics and polymers.
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संबंधित प्रश्न
What are the causes of air pollution?
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
_______ gas is used for filling weather observation balloons.
Write ‘true’ or ‘false for the following;
Carbon dioxide is given out during photosynthesis
Air is made up of oxygen only.
______ gas cylinders are used for breathing purpose for a diver going deep into the sea.
“Air is not an elementary substance, but a composition”. Why?
______ exists in nature as silicates, carbonates, oxides, and water. It also exists in a free state as part of the air in the atmosphere.
Match the following
| 1. | Oxygen | a. | Carbon dioxide |
| 2. | Azote | b. | Nitrogen |
| 3. | Solvay process | c. | Vital life |
| 4. | Gun powder | d. | No life |
Nitrogen is an essential element present in proteins and nucleic acids which are the building blocks of living things.
What is not true about air?
