This book has been written in accordance with the current CBCS B.Sc. Program of the University of Delhi. It also suitably caters to students of B.Sc. (Hons.) and B.Sc. (Gen.) courses in all the Indian Universities. Considering the short period of time at the disposal of students in a semester, an attempt has been made to present the text in a student- friendly manner. This should eliminate the need to refer to many books for one paper. The text has been presented in a manner that would be comprehensible to even an average student. The book covers chapters on Aromatic Compounds, Alkyl Halides, Aryl Halides, Alcohols, Phenols, Ethers and Epoxides, Aldehydes and Ketones & Aromatic Aldehydes and Ketones. Review problems (Solved) and unsolved exercises along with some practice questions have been given in the book.