About the book:-
The present book is a successful attempt to present the latest curriculum developed for the students of higher secondary level in a holistic form. In present times, as soon as the student enters intermediate, he sets his goal. After choosing science stream, he either wants to go into high technical field like medical science, engineering, information technology etc. or wants to become a professor or researcher by doing higher studies on some subject of science. For this, he has to face the related entrance examinations and competitive examinations. For this, it is necessary that the basic principles and facts of science subject should be understood well from the level of class XI and XII. The presented book has been written with this objective. In the book, keeping in mind the difficulties of the students, every effort has been made to make the subject matter simple, understandable and interesting and for this, suitable pictures, numerous examples of daily life, numerical examples and balanced adequate subject material have been included in a modern way in simple, easy and colloquial language. New and difficult words have been expressed in English and Hindi language and comparative tables, graphs, tables of summary of reactions have also been given in the book.

In each chapter, the method of solving numerical questions has been explained with the help of sufficient number of examples and sufficient number of practice questions have been included at the end of the chapter. Subject related objective and multiple choice questions have also been included for various competitive examinations.