{"knowledge_schema": {"broad_category": "Chemistry \u2192 Molecular Symmetry", "refinement": "This problem involves understanding the molecular symmetry of a specific hazardous product (E) formed through chemical reactions.", "specific_scope": "The focus is on determining the symmetry group of product E based on its molecular structure and the reactions it undergoes.", "goal": "Identify the correct molecular symmetry group from the given options based on the characteristics of product E."}, "summary": "This problem requires knowledge of molecular symmetry and the ability to analyze the structure of a chemical compound formed through a series of reactions. The task is to determine the molecular symmetry group of product E, which is formed from the reaction of product C with gas D. The options provided represent different symmetry groups, and the correct answer is C2v, indicating a specific type of symmetry in the molecular structure of E."}