Which of the following reagent does not oxidize HCl ? — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Examine the solubilities. Calcium sulfate (CaSO4) is sparingly soluble, but lead(II) nitrate (Pb(NO3)2) is highly soluble. Step 2: When reacted, the extremely insoluble lead(II) sulfate (PbSO4↓) precipitates, which has a much lower solubility product (Ksp) than calcium sulfate. Step 3: Since the reaction results in the formation of a highly insoluble precipitate from the solution, it is classified as a precipitate formation reaction (type A), matching option (a).