As a teacher, I have identified or witnessed numerous students' Chemistry problems. I have a thorough understanding of their flaws and the underlying causes. Henceforth, in my classroom teaching, I will always include my own study notes to help students easily learn reactions using reagents. After analysing the successful results of this concept, I have decided to give it in the organised form of my study notes, and now here it is in your hands. This book mainly contains reducing agents and oxidising agents with appropriate examples that make the concepts clearer and show a way of applying them in the reactions. These innovative concepts are very useful in answering the questions of various competitive exams like JEE/NEET, BITS, CSIR-NET, JAM, private universities, CBSE/NCERT book questions, IGCSE AS and A level (Cambridge), etc. I hope the book will help you in every step of your preparation. I wish you all the success.