Class 11 Chemistry Concepts of Chemistry Introduction

Role of chemistry in different spheres of life

What is Chemistry?

  • Chemistry is the science of atoms, molecules and their transformations.
  • It can also be defined as that branch of science that deals with the study of the composition, properties and interaction of matter.
  • Knowledge of chemistry helps us to know:-
  1. The properties of different substances like diamond, coal, plastics etc.
  2. In preparation of soaps like liquid or powder.
  3. The fabrics, plastic toys, paper, pencil, eraser, sugar cubes, petrol or diesel etc.
  4. In the manufacture of different types of fertilizers, pesticides and medicines.
  5. Answers to questions regarding how many atoms or molecules are there in a given mass of matter.


Chemistry helps us to answer the following questions:-

  • To count the number of atoms and molecules in a given mass of matter?
  • How to see the atoms and molecules?

Advantages of studying chemistry

  1. With a better understanding of chemical principles it has now become possible to design and synthesise new materials having specific magnetic, electric and optical properties.
  2. Safer alternatives to environmentally hazardous refrigerants like CFCs (chlorofluorocarbons), responsible for ozone depletion in the stratosphere, have been successfully synthesised.

Problems which can be tackled with the study of chemistry:-

  1. Management of Green House gases like methane, carbon dioxide etc.
  2. Understanding of bio-chemical processes, use of enzymes for large-scale production of chemicals and synthesis of new exotic materials are some of the intellectual challenges for the future generation of chemists.
  3. Understanding of bio-chemical processes, use of enzymes for large-scale production of chemicals.

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