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प्रश्न
Give reason:
Mountaineers and divers carry oxygen cylinders with them.
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उत्तर
For artificial respiration mountaineers carry oxygen cylinders as at high altitudes, the air is thin and breathing becomes difficult. Also divers carry oxygen cylinder for artificial respiration as there is less oxygen dissolved in water (less dense) and breathing becomes difficult.
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संबंधित प्रश्न
Answer the question put against the following constituents of air:
Nitrogen : Explain its significance for plants and animals.
What are the causes of air pollution?
Fill in the blanks
Oxygen is used in ___________the food to get _______.
Give a reason why nitrogen is filled in food packets and not oxygen.
Complete the statement given below by filling in the blank with the correct word from the words given
___________is an example of a pollutant present in the air.
Mention one necessary condition for the combustion to take place.
Why is air considered as a mixture?
_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.
- Nitrogen
- carbon-di-oxide
- Noble gases
- Oxygen
Why do traffic assistants wear a mask on duty?
The solid form of CO2 is called dry ice which undergoes condensation.
