Which are the gases present in air? Why is air called a homogeneous mixture?
(I need exact answer )
Answers
Air is a mixture of nitrogen, oxygen, carbon dioxide, argon, water vapour,hydrogen etc in their gaseous forms.
Now can you see nitrogen present in air separate from oxygen?
Can you see oxygen separate from carbon dioxide in air?
Even if you see around you, do you find any difference in air present right to you with air present left you?
Can you distinguish their components by looking at it?
The answer to all these questions is a big NO.
Pure air made of some definite gases is a homogeneous mixture as all its components are mixed together very well and do not have visible boundaries.
Note: The fact goes for pure air only. Air mixed with pollutants is not a homogeneous mixture. Its heterogeneous.
Answer:
This answer is given by science teacher. so,it is correct.
Explanation:
Gases like nitrogen [symbol: N and Molecular formula N2] oxygen [Symbol:O and M.F. O2] Carbon dioxide [NO2], Sulphur dioxide [SO2] ETC. Are present in the air.
Air is mixture of all of these gases. The constitution gases can not be separated naturally from this mixture, therefore it is called a homogeneous mixture.