Sailent features of the book: Use od SI units to make the students aware of inernational trends in the scientific world. Latest IUPAC name of elements and compounds A large number of activities helpful as an effective way of learning by doing. Statement of main facts with reasons given in the tabular forms. Comments, Remarks, Notes, Do you know and more information to maintain continuity and interest in the discussion. Illustrative examples and labelled diagrams for a proper understanding of the concepts. Activity based group discussion between the teacher (T) and group of students (S). Main points for quick revision of the contents of each chapter. Questions in the light of guidelines of CBSE as: Very short answer type questions (VSA) Short answer type questions (SA Type I and Type II) Long answer type questions (LA) Questions on Higher Order Thinking Skills (HOTS) Multiple Choice Questions (MCQs) Assertion and Reasoning Questions Programme for International Students Assessment (PISA) Questions