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VSAT 2022

What is the Gaseous State?

Last updated date: 29th Jan 2023
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There are prominently three phases: Solid, Liquid, and Gaseous, which we see or come across everyday life. Here, we will talk about the gaseous state. This is the invisible state which cannot be seen by the human eye. The reason behind this is the space and lowest force of attraction between the atoms. The gaseous phase does not have the fixed volume and definite shape. As we go in the periodic table, there are eleven elements which act as gas at room temperature whereas some act as gases at a higher temperature.

As the temperature goes to a higher temperature, the liquid or solution forms gases and even solid state atoms also show sublimation processes and get converted into gases. These gases are lighter in weight and all the gases comprise air which is the part of the atmosphere. The gases are most important for life to exist, Oxygen gas which we breathe for living and carbon dioxide which plants breathe for living.


Example of Gases

The gaseous phase is the state which does not have any shape and definite volume. The gases are present in the atmosphere around us. The gases are the most important for living and even non-living objects. Water comprises two significant gases Oxygen and Hydrogen gas. There are 11 elements present in the periodic table which are Hydrogen, Nitrogen, Oxygen, Helium, Neon, and Argon even when they combine they form gases such as carbon dioxide, oxygen gas, chlorine gas, fluorine gas, and nitrogen gas.


What is Gas?

Gas is the state which has the lowest force of attraction between the atoms which form them invisible to the naked eye. The gas has no definite volume which is why they have the lowest viscosity which makes them flow at a very high speed. The gas has a difference due to the presence of the different atoms to form molecules. The density of the gaseous state is lesser than the solid and liquid phase. The density is inversely proportional to the volume of the gas. The volume of the gaseous phase is higher than the solid and liquid phases.


Properties of Gases

Every phase is used to make a part of the universe. The gaseous phase has its own importance in making the ecosystem and surroundings. The gaseous phase gives us the invisible gases which make life run. Not a single living being can survive without oxygen and carbon dioxide. Without nitrogen, there will be no vegetation. The properties of the gaseous phase are listed below:

  • The gaseous phase is very important for the living being to live. If there is no air, they will die in minutes.

  • The gaseous phase is also used in many non-living actions such as fire needing oxygen, if there is no oxygen there will be no fire.

  • The gaseous phase also forms an atmosphere which protects our earth from outer radiation such as ultraviolet radiation from the Sun.

Types of Gases

There are many types of gases present in the atmosphere of which 78% comprises Nitrogen, and 21% oxygen. There are other gases also present in the atmosphere but in little amounts such as 0.93% of Argon and carbon dioxide at 0.04% and there are traces of other gases such as Neon, Helium, Methane, Krypton, and Hydrogen. There are water vapours also present in the atmosphere which decides the humidity of the environment. If the water vapours are high in the atmosphere it makes the environment more humid.


Gases Elements

There are many gas elements present in the periodic table as they are discovered in the atmosphere. There are so many elements which are in gas forms such as Helium, Argon, Krypton, Neon, Hydrogen, Xenon, Nitrogen, Radon, Fluorine, Chlorine, Oxygen, Carbon, Sulphur, Iodine, Mercury, Cobalt, Rubidium, and Bromine. These elements are present in the gas phase in the atmosphere which also forms gases when they form bonds with each other. The Oxygen atom bonded with an Oxygen atom to form the Oxygen gas volume whereas the carbon atom bonded with an Oxygen atom to form carbon dioxide.


Key Features

  • The gaseous phase is the state which is lighter weight and does not have any definite shape and volume. The force of attraction is lesser than the solid and liquid phases.

  • There are many elements present in the gas phase such as Helium, Nitrogen, Oxygen, Carbon, Fluorine, Bromine Neon, etc.

  • The density of the gaseous state is lesser than the solid and liquid phases. The density is inversely proportional to the volume of the gas. The volume of the gaseous phase is higher than the solid and liquid phases.

  • The atmosphere can be toxic in nature due to the increase in toxic gases. The toxic gases are sulphur dioxide, carbon monoxide etc.

  • There is abundant Nitrogen gas having 78% and 21% oxygen which makes up 99% of the atmosphere. There is 0.9% of argon and 0.04% of carbon dioxide and other trace gas present in the atmosphere.

Interesting Facts

  • Helium is the lightest gas which is used to fill in the balloon. Helium is the first element discovered by scientists in the Sun.

  • Carbon monoxide is a dangerous gas which can kill a human being as carbon monoxide gas spreads in the body faster than oxygen gas.

  • Nitrogen oxide is called the laughing gas which makes us laugh non-stop sometimes because it goes to the brain and produces a tickling sensation in the body.

Competitive Exams after 12th Science

FAQs on Gaseous State

1. What are the properties of the different states of matter?

The main feature between the different states of matter is intermolecular attraction.

  • The stronger the intermolecular attraction, the closer the atoms come to each other and form a solid state whereas the intermolecular attraction is the weakest forming a gaseous state and the liquid forms an intermediate attraction.

  • Density is inversely proportional to volume. The density of the solid is so much because of the less volume whereas the density of the gaseous state is the lowest.

  • The shape of the solid is fixed and rigid whereas the liquid and gaseous have no shape.

2. What do you mean by homogeneous and heterogeneous mixture?

Homogeneous mixtures are those mixtures which are composed of the same solute in the same proportion and form a homogenous mixture.


For example, two hydrogen atoms for Hydrogen gas. Heterogeneous mixtures are a mixture composed of different solutes in different proportions and form a homogenous mixture. For Example, Carbon atoms react with Oxygen gas to form Carbon dioxide gas.

3. What do you mean by the atmosphere?

Atmosphere can be defined as the different proportions of gases present in different altitudes. The atmosphere consists of a different number of gases forming the layer that even protects us from outer space and the ultraviolet radiation from the Sun.

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