The present book for Class XI Chemistry contains different types of questions of varying difficulty levels. Also, a detailed explanation for comprehensive understanding has been given for all objective and subjective problems. Some questions covered in the book would require the students to apply simultaneous understanding of more than one chapter/unit. The book has been divided into 14 chapters namely Some Basic Concepts of Chemistry, Structure of Atom, Classification of Elements & Periodicity in Properties, Chemical Bonding & Molecular Structure, States of Matter, Thermodynamics, Equilibrium, Redox Reactions, Hydrogen, The s-Block Elements, The p-Block Elements, Organic Chemistry Some Basic Principles & Techniques, Hydrocarbons, and Environmental Chemistry. The problems covered in the book will encourage teachers to design quality questions on their own. The questions provided in the book will test comprehension, information recall, analytical thinking and problem-solving ability, creativity, and speculative ability. The book will also be highly useful for school examinations and to build a foundation for engineering & medical entrance examinations. As the book contains detailed and comprehensive solutions for NCERT Exemplar problems for Class XI Chemistry, it for sure will help in discouraging rote learning.