The title is aimed at students aspiring to take competitive examinations such as NET (CSIR/UGC), GATE, SLET, ONGC, IARI, BARC, IISC and other PhD entrance exams. The book is designed to help learners practice and sharpen the skills required to achieve the best scores. The comprehensive text is designed according to the latest CSIR syllabus and is divided into three major sections with a model test paper. The text features pointwise theory for students to master the concepts and practice questions, along with previous years' archives from the last 10 years supported by detailed solutions. Each chapter is presented diagrammatically in an enhanced way using stopovers, tables, and chemical reactions. This approach is designed to make it easier for students to learn the facts and retain them in their memory.