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प्रश्न
Explain the following observations very briefly
Breathing through mouth may harm you.
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उत्तर
There are many dust particles, gases and water vapours present in the air that we breathe. When we inhale through nostrils, the entry of these harmful particles is prevented by the fine hair and mucus present in the nose as they filter the air but when we breathe through the mouth there’s no such filtering of particles. Thus, they enter our body, reach the respiratory tract and make us ill.
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संबंधित प्रश्न
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
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Give the chemical name of rust.
State the utility of oxygen for respiration in living organisms
Name the following:
The main, rare (inert) gas present in air.
_______ can be seen moving in a beam of sunlight in a dark room.
All living things use oxygen for breathing.
The main component of air is oxygen.
The air in coastal areas have more oxygen.
Which of the following components of air is present in the largest amount in the atmosphere?
The components of air which are harmful to living beings are ______.
