This General Knowledge book on Physics, Chemistry, Biology and Computers contains multiple choice questions (MCQs) for competitive examinations. It contains 1000 plus multiple choice questions. Answer key has been provided. Every attempt has been made to ensure that the questions included are topical, and relevant to contemporary trend of various competitive and entrance exams and mind-set of question paper setters. This book is useful for all exams held by UPSC such as Civil Services, CDS, NDA, Railways, IBPS (Banking Services), SSC & other exams organized by state Public Service Commissions and other examining bodies. Features: 1000+ MCQs answer keys previous years questions.