The thoroughly Revised & Update 2nd Edition of the book General Science & Technology for Civil Services PT & Mains, State PSC, CDS, NDA, SSC, & other UPSC Exams been designed with special focus on IAS Prelims & Main Exams. The book is prepared as per the trend of questions asked in previous years question papers of various UPSC/ State PSC/ SSC exams. • In nutshell the book consists of complete theory of Physics, Chemistry, Biology and Technology with MCQ Exercise including past questions of various exams. • The book also covers past questions of IAS Mains GS III and various State PSC exams. • The book also covers Technology in the development of India and its future prospects in the field of research. The part deals with Energy, Nuclear Technology, Information Technology, Space research, Communication and Defence. • The book is empowered with a variety of questions (Simple MCQs, Statement Based MCQs, Match the column MCQs, Assertion-Reason MCQs) and thus more than 3800 questions are included in the book. Solutions are also provided in the book. • Past MCQs of last ten year questions of various competitive exams have also been included in the book.

INDEX Note for Students 1. Essay Writing • 1.1 Important Tips before you start writing the essay • 1.2 18 Most Important GS Paper I Topics for IAS Mains 2019 2. GS Paper I: Indian Heritage and Culture, History and Geography of the world and Society • 2.1 Important Tips before you start writing the essay • 2.2 25 Most Important GS Paper I Topics for IAS Mains 2019 3. GS Paper II : Governance, Constitution, Polity, Social Justice and International Relation • 3.1 Important Tips before you start writing the essay • 3.2 25 Most Important GS Paper II Topics for IAS Mains 2019 4. GS Paper III : Technology, Economic Development, Bio- diversity, Environment, Security and Disaster Management • 4.1 Important Tips before you start writing the essay • 4.2 25 Most Important GS Paper III Topics for IAS Mains 2019 5. GS Paper IV : Ethics, Integrity and Aptitude • 5.1 Important Tips before you start writing the essay • 5.2 25 Most Important GS Paper IV Topics for IAS Mains 2019 6. Sample Answers to IAS Mains Questions and Essays • General Studies Paper I • General Studies Paper II • General Studies Paper III • General Studies Paper IV • Essays