The thouroughly Revised & Updated 2nd Edition of the book "The General Science Compendium" has been prepared with enormous efforts for all IAS aspirants, State PCS and other competitive exams. The book is prepared on the concept "Latest Information - Authentic Data". The book has been divided into 4 parts - Physics (6 Chapters), Chemistry (7 Chapters), Biology (7 Chapters) & Science and Technology (6 Chapters). followed by an exercise with 1300+ Simple MCQs & statement based MCQs. The book captures most of the important questions with explanations of the past years of the IAS Prelim exam, State PSC, NDA and other competitive exams distributed in the various chapters. The book not only covers 100% syllabus but is also covered with Mind Maps, Infographics, Charts, Tables and latest exam pattern MCQs. The emphasis of the book has been on conceptual understanding and better retention which are important from the point of view of the exam.