Chemistry

This chapter explains topics such as Necessity and Basis of Classification of Matter, Classification of Substances on the Basis of Different Characteristics, Fundamental Units of Matter, etc.

This chapter explains topics such as Pure Matter, Element and Compound, Type of Mixture, Properties of Mixture, etc.

This chapter explains topics such as Types of Changes, Physical and Chemical Changes, Natural and Artificial Changes, Controlled and Uncontrolled Changes, etc.

This chapter explains topics such as Plant Fibres, Type of Soil for the Cultivation of Fibrous Plants, Spinning of Cotton Threads, Jute, etc.

This chapter explains topics such as Air, Composition of Air, Need and Utility of Oxygen Present in Air, Utility of Air, etc.

This chapter explains topics such as Necessity of Water, Utility of Water, Sources of Water, Physical Properties and States of Water, etc.