This book can be used for other competitive exams purposes such as CSIR-UGC-JRF-NET, UGC-SLET (SET), BARC, GDC, GIC, lectureship, etc. I have written all the detailed of reactions with proper stereochemistry. So that readers should not have any difficulties in solving complex problems. I am sure that this book will be highly helpful for all the Indian graduate and postgraduate students who want to improve their organic chemistry from academic as well as competitive points of view. GATE is an intellectual exam, which is organized by the top institutes of India, namely; IISc Bangalore and seven IITs (Bombay, Delhi, Guwahati, Kanpur, Kharagpur, Madras and Roorkee) of India to know the Excellency of the students. This exam can is also opened for the international students especially Bangladesh, Nepal, Sri Lanka, Ethiopia, and the UAE. This will be a boon for the students, who want to enter in an excellent institute in India for higher education, such as M. Tech. or Ph.D. program. Albeit that, GATE-qualified students with good rank fellow can also be entered into the nine-Maharatna companies (ONGC, NTPC, BHEL, GAIL, HPCL, BPCL, IOCL, etc.) in India for job purposes. In this book, I have discussed only organic chemistry problems that are asked in GATE-CY exams. This book gives a detailed idea about one-pot as well as multi-step reactions, which are the constitutes; name reactions, conformational stability, stereochemistry, reagents chemistry, etc. and partially, it covers the courses of graduate and post-graduate organic chemistry including competitive exam problems with their manual solutions. Broadly, this book covered detailed solutions for GATE-CY question papers from 2005 to 2022. It will equip students with ample knowledge in the organic chemistry to enable them to solve the questions in various qualifying examinations. I aimed to help and encourage the students who want to work in the area of chemistry. Where I have done my best in the writing of this book to provide good knowledge of organic chemistry with 3D views of the reaction mechanisms. The original sources have been cited accordingly up-to-date. Herein, you can see different reaction mechanisms with more accuracy.