This book is a compendium of questions and answers from all areas of chemistry. These types of questions are normally posed to candidates appearing for interviews for scientist¿s jobs at masters level. The outstanding feature of this book is that it has not only the questions but also that the questions are answered in a detailed way based on fundamental and advanced concepts in chemistry and chemical engineering. The chemistry starts from you, your body, the DNA/RNA systems, etc. to the numerous chemicals and their reactions that keep the body warm and maintains the brain intelligent enough to take decisions. To understand these deceptively simple process, one requires the aid of chemistry, through a ready reckoner. This book bridges the gap between your inquisitiveness and information available in the areas of chemistry and chemical engineering.