Chemical changes case 163 acid-base-boundary. A student sorts acid, alkali and base statements. Which option keeps the terms distinct? Focus on data whether solution acidic neutral alkaline in The pH scale and neutralisation, not on a neighbouring Unit 4.4 reaction idea.

The correct option is Chemical changes case 163 acid-base-boundary: Keeps the acid-base distinction tied to the named substance for data whether solution acidic neutral alkaline.

The correct option is Chemical changes case 163 acid-base-boundary: Keeps the acid-base distinction tied to the named substance for data whether solution acidic neutral alkaline. It is correct because it directly supports the approved learning objective to use pH data to identify whether a solution is acidic, neutral or alkaline in The pH scale and neutralisation. The other options are incorrect because they blur a Unit 4.4 concept boundary: acid versus alkali versus base, oxidation versus reduction, displacement versus reduction, electrolysis versus electroplating, anode versus cathode, positive versus negative ions, oxidation state versus ionic charge, or strong acid versus concentrated acid.