This is a guide book which is based on the textbook from NCERT (National Council of Educational Research & Training). This book is based on CBSE (Central Board of Secondary Education) syllabus which is followed by a majority of private schools in India. Salient Features of This •Key topics from each chapter in simple language. •Each topic has been explained in brief and in an easy to understand language. •Solution to exercise questions from NCERT textbook. •Extra questions with answer.