Water

This topic highlights the importance of water for all living things. It explains the different sources of water. It also briefs on the three states in which water exists in nature.

This topic briefs the physical properties of water, including its melting point and boiling point. It also mentions the density of water with its unit. We will study the appearance like color, temperature, taste and odor of the water.

In this topic, we will discuss the chemical properties of water. We will discuss its amphoteric nature such as acidic and basic. We will also study about the redox and hydrolysis reaction in brief.

This topic sheds light on solutions along with the examples. We will understand the meaning of solute and solvent. We will also study the properties of a solution along with the concentration of a solution.

We will learn about solubility of liquids in this topic. The term refers to the ability of a solute to dissolve in a solvent. We will also learn about the saturation level of substances here in detail.

In this topic, we will learn about crystals and crystallisation. We will study the meaning of crystallisation and the crystallisation process. We will also discuss its uses for separating substances, along with its applications.

This topic sheds light on drying and dehydrating agents. It tells us that dehydrating agents remove water which is chemically bound to a substance while drying agent removes moisture from other substances.

This topic sheds light on soft and hard water. It highlights the meaning of each in terms of action of soap. We will study the advantages and disadvantages of soft and hard water. It also describes the types and causes of hardness.

In this topic, we will learn about water pollution. It discusses the causes, pollutants and effects of water pollution. It also covers international standards for drinking water.