Question

Which are the gases present in the air? Also mention their composition.

Answer 1

Hint: To answer this question, we first need to understand what the atmosphere is. An atmosphere is a layer or series of layers of gases that surround a planet or other material body and are held in place by gravity. If the gravity on which an atmosphere is subjected is high and the temperature of the atmosphere is low, the atmosphere is more likely to be retained.

Complete answer:
Air – Air is made up of a number of different gases. Nitrogen, oxygen, which is the life-sustaining ingredient for animals and humans, carbon dioxide, water vapour, and trace amounts of other elements make up the atmosphere (argon, neon, etc.).
Gases - One of the four basic states of matter is gas. Individual atoms, elemental molecules built from one type of atom, or compound molecules created from a variety of atoms make up a pure gas. A gas mixture, such as air, consists of a number of different pure gases.
Composition of air –

ELEMENT	VOLUME BY %
Nitrogen	78.08
oxygen	20.95
argon	0.93
Carbon dioxide	0.040
neon	0.0018
helium	0.0005
krypton	0.0001
Hydrogen	0.00005
xenon	0.0000087

Air's Characteristics -
Air is colourless and odourless. It's an impenetrable substance that can only be felt. All living things require oxygen to survive. Wind is the term for moving air.
It is a mixture of various gases that occupy space. As a result, they, like all other matter, take up space. When you blow into a balloon, it expands because the air fills the empty space.
Air exerts pressure because it has weight, and air pressure is the pressure exerted by the weight of air. This mixture of gases at the surface is denser than at high elevations due to gravity. This explains why the gaseous atmosphere in the mountains is thinner than at ground level.
Another feature is its ability to expand. It swells and takes up more area when heated. It becomes thinner as it expands. As a result, the warm wind has a lower pressure than the cold wind.

Note:
Any physical, chemical, or biological change in the air is referred to as air pollution. Pollution of the air by toxic gases, dust, and smoke has a significant impact on plants, animals, and humans. In the atmosphere, there is a specific percentage of gases.