Importance of Water, States, Structure of Water, Human Beings, Other Important Uses (For CBSE, ICSE, IAS, NET, NRA 2022)

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What is Water?

  • Water is a colorless and transparent chemical substance which is the main constituent of streams, oceans, lakes on the earth՚s crust.
  • The chemical formula of water is . It is made up of two hydrogen atoms and one oxygen atom which are held together by covalent bonds. 71 % of the earth՚s surface is made up of this liquid.


  • The solid state of water is known as ice. Water freezes at Celsius (freezing point of water) to form ice.
  • The liquid state of water makes up most of the earth՚s surface. It finds its application in a wide range of areas.
  • The gaseous state of water is known as water vapor. At elsius water reaches its boiling point and gets converted into water vapor.

Structure of Water

Structure of Water

Water – Structure

Physical and Chemical Properties of Water

  • It is a colorless and a tasteless liquid.
  • Compared to other liquids, it has higher thermal conductivity, specific heat, surface tension, etc.
  • Water is referred as universal solvent as most substances such as acids, salts, sugar, and gases readily dissolve in it.
  • Water has the capability to form azeotropes with other solvents.
  • The electrical conductivity of water is low. However, it can be improved by adding ionic substances that dissociate to give ions in the aqueous phase for carrying the charge.

Water – Electronic Configuration

Know more about the properties of water.

The Importance of Water


The most important use of water is for agriculture. Irrigation is necessary for agriculture, and for that, water is the key component to produce food.


The human body contains 50 % to 78 % of water according to the size of the body. Humans need to drink 7 liters of water every day to avoid dehydration.


It plays an important role in digestion and other biological processes that occur in living organisms. It plays an important role in maintaining the pH of the body. It also helps in the movement of antibodies from the immune system.


It helps in regulating the body temperature. Water provides the necessary cooling effect to the body.


Water removes harmful toxins from the body through perspiration and urination. It prevents the buildup of wastes in living organisms.


It is used to make emulsions and solutions which are used for washing purposes.

Importance of Water in Human Beings

  • Insufficient water content in the human body results in severe dehydration, which is often accompanied by kidney failure, seizures, and swelling in the brain.
  • Water helps improve the circulation of oxygen throughout the body.
  • It also plays a crucial role in the digestion of food.
  • Water is a very important component of saliva, which helps break down food.
  • The excretion of waste in the human body requires water. Insufficient water levels in the body may increase the strain on the kidneys, resulting in the formation of kidney stones.

Other Important Uses of Water

  • If not for the high specific heat of water, the temperature of the Earth՚s surface would be much lower. This would make it difficult for life to survive.
  • The water in the Earth՚s oceans absorb heat from the sun during the day and help maintain the temperature during the night.
  • Water is necessary for the irrigation of crops and is, therefore, an integral part of agriculture.
  • It is widely used in cooking activities since it boils at a temperature of
  • Humans make use of water for a wide range of domestic activities such as washing and cleaning.
  • Water also serves as a medium for the transportation of cargo. Many goods are transported between the Earth՚s continents via ships.

Industrial Uses of Water

  • Many industries require large quantities of water for processing, cooling, and diluting products. Examples of industries that consume large quantities of water include the paper industry, the food industry, and the chemical industry.
  • Water is also used as an industrial solvent for the production of several commercially important products. Almost all power plants that generate electricity employ water to spin turbines.
  • Heavy water, an important form of water, is widely used in nuclear reactors as a neutron moderator.


Why the Water is Important?


  • In our body, water brings nutrients to all the cells and oxygen to our brain. Water enables nutrients, proteins, amino acids, glucose and other compounds to be consumed and assimilated by the body. Toxins and waste are washed out by sewage.
  • In order to control body temperature, water helps.

What Are the Uses of Water in Our Daily Life?


  • To start, we all use water to drink, wash, clean, prepare, and grow food, making it our most precious survival resource.
  • What contributes to the daily use of domestic water is that industry needs much more water to produce electricity, create materials, and move people and goods.

What is the Importance of Water Supply?


  • Providing potable water is probably the most important of all public utilities. For drinking, heating, cleaning, carrying away waste, and other domestic needs, people rely on water.
  • Water delivery schemes must also satisfy public, commercial and industrial specifications.

Why is Water Important to Life Essay?


  • The cornerstone of our lives is water. The human body needs water for everyday life. We can live without any food for a week, but we cannot even survive without water for three days.
  • 70 per cent of our body fluids are also water.

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