(1) The presented book General Science written for the examination of the UPSC, Different state PSC exam, SSC and other competitive exams. This book presents complete and most relevant study matter as per competitive exams syllabus. (2) This book consist basic and important concepts of Physics, Chemistry and Biology. As for convenience and ease of the student chapters are divided in small topics. (3) This book also helpful for those candidates who wants quick revision and multiple time practice before exams.