PbO2 + HNO3(dil.) -> No dissolution — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Lead dioxide (PbO2) is a very strong oxidizing agent in which lead is in the +4 state. Step 2: Dilute nitric acid is not strong enough to reduce or react with lead dioxide, and PbO2 is completely insoluble in it. Step 3: Since no chemical reaction or dissolution occurs, this process is classified as no reaction (type D), corresponding to option (d).