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प्रश्न
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Oxygen
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उत्तर
Almost all the living organisms present on earth inhale oxygen or use oxygen in the food making processes (plants use oxygen for photosynthesis). Hence, it is obvious that oxygen is an essential element for survival and there will be no life in the absence of oxygen.
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संबंधित प्रश्न
Complete and balance the following chemical equation.
CaO + H2O → ____________
Tick (√) the most appropriate answer.
The presence of water vapour in air is essential for :
Tick (√) the most appropriate answer.
Which is not a polluting gas for the air?
What is the percentage of nitrogen in air?
What happens if the percentage of carbon-dioxide increases in the air?
The constituent of air that supports combustion is _____.
Inhaled air contains a large amount of carbon-di-oxide.
Match the following.
| Nitrogen | Respiration in living animals |
| Oxygen | Fertilizer |
| Carbon dioxide | Refrigerator |
| Dry ice | Fire extinguisher |
Write a note on nitrogen.
The solid form of CO2 is called dry ice which undergoes condensation.
