For the students aspiring to clear competitive examinations in the future, mastering the text and the concepts covered in the NCERT books is very crucial for building the foundation that would help in clearing the future competitive examinations. 'Master the NCERT' series from Arihant has been designed to work as a unique tool to reconcile the text of NCERT with the help of Objective Type Questions. This book containing objective questions framed on each line and paragraph of NCERT Textbook for Class XI Chemistry has been divided chapter wise into 14 chapters namely Some Basic Concepts of Chemistry, Structure of Atom, Classification of Elements and Periodicity in Properties, Chemical Bonding and Molecular Structure, States of Matter, Thermodynamics, Equilibrium, Redox Reactions, Hydrogen, s-Block Elements, p-Block Elements, Some Basic Principles and Techniques, Hydrocarbons and Environmental Chemistry. The questions in each chapter have been segregated into Level I, Level II and Miscellaneous category. The Level I contains direct easy questions, Level II contains questions with a raised difficulty level and those of highest difficulty have been covered under miscellaneous category. Also an amalgamation of questions asked in previous years' examinations has also been provided in the book to increase the comprehension of the concepts covered in the chapters. All the multiple choice questions have been well supported with detailed answers to enhance the grip over the concepts. Wherever required grammatical representation of the concepts has also been given for thorough explanation of the concepts on which the questions are based. This resource book can be used by students at any level of preparation to get better exposure in gradual manner by preparing the chapters in topic-wise manner with question answer format along with detailed solutions.