Preparation of looking mirrors involves the use of : — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Silvering of mirrors requires the reduction of silver ions to form a uniform, reflective coating of metallic silver on a glass surface. Step 2: This is achieved by reacting Tollens' reagent (ammoniacal silver nitrate solution) with a reducing agent such as formaldehyde (HCHO). Red lead is subsequently applied as a protective backing coat. Step 3: Therefore, the complete process of preparing mirrors utilizes ammonical AgNO3, red lead, and HCHO, matching option (d).