This book covers nearly all topics in Organic Chemistry taught upto the B.Sc. level. Topics like resonance, H-bond, hybridization, IUPAC nomenclature, acid-base theory of organic compounds, stereochemistry, structure reactivity relationship and spectroscopy have been introduced early in the book. Subsequent chapters deal with synthetic polymers, aliphatic and aromatic hydrocarbons, alcohols and phenols, ethers, aldehydes, carboxylic acids and their derivatives, amines, carbohydrates, organometallics and terpenes. These topics have been discussed in-depth and in a comprehensive manner. A great deal of attention has been focussed on chemical reactions and their mechanisms. The scope and limitations of the reactions have been stated. Certain topics of general interest namely C.N.G., L.P.G., simple drugs, DNA finger printing, PUFA, trans fatty acids, soaps and detergents, pesticides, industrial alcohols, coal tar, octane number, chromatography, and artificial sweeteners have been highlighted at appropriate places. Also included are approximately 900 in-text and end-of-the-chapter problems, and a set of Multiple Choice Questions (MCQ) at the end of each chapter. A glossary of important terms is also included. This book has been designed as a comprehensive textbook for students upto B.Sc. level. In addition, the book will be immensely useful for those preparing for competitive examinations like I.I.T., AIEEE, medical entrance and others.