Thoroughly revised and updated second edition of the book. A unique book that provides selected and challenging problems for competitive exams specially IIT-JEE. There are 2 levels of Exercises in each of the 14 chapters. Level â€“ I builds solid foundation which helps in solving tough problems ahead. Level â€“ II takes you to a level at par with JEE, where mind starts solving tough problems only by relying on the basic concepts. The soul aim of the book is to develop concepts through problems. Problems have been fabricated keeping in mind the examiners view point for that particulars concept and the current examination pattern. Reaction Mechanism is the focus of the book and questions have been developed in such a way that reactions will be revised throughout the book.