Mastering Advanced Problems. The "Second Stage" to cultivate practical skills for passing the exam. This book is a comprehensive collection of advanced practice problems (NO. 2) with a complete focus on the Poisonous and Deleterious Substances Handler Examination, featuring 100 questions and detailed answers/explanations. Building upon the basic knowledge learned in NO. 1, the book delves deeper into regulations, chemistry, and practical applications. With content similar to the actual exam level, you can aim to surpass the passing score. ⸻ Contents of this book: • Chapter 1: Regulations Concerning Poisonous and Deleterious Substances (Advanced) Focuses on practical questions that test understanding of laws, including registration renewal, notification obligations for transfer/disposal, the supervisor system, and penalty provisions. • Chapter 2: Basic Chemistry (Advanced Problems) Emphasizes calculation problems and understanding of chemical formulas, including oxidation-reduction, solubility, ion reactions, and pH calculations. • Chapter 3: Properties and Handling Methods of Poisonous and Deleterious Substances (Advanced) Includes detailed properties, hazards, and reactions of frequently tested chemicals such as sulfuric acid, toluene, phenol, methanol, arsenic, and chloroform. • Chapter 4: Practical Problems (Safety Management/First Aid) Addresses on-site practical work, including risk assessment of the work environment, procedures for ingestion/leakage, and selection of signs, identification markings, and protective equipment. ⸻ Features: • 100 multiple-choice questions reflecting exam trends, with detailed explanations • Each question includes "legal basis + supplementary knowledge + exam points"