Evaluate the two proposed answers. Which are supported? I. Formation of an insoluble solid from solutions — the appropriate term: Ion exchange. II. Separating coloured components by different movement on a medium — the appropriate term: Isotopes.
Correct answer: A
I is incorrect: Formation of an insoluble solid from solutions → Precipitation. The insoluble product separates from the liquid phase. II is incorrect: Separating coloured components by different movement on a medium → Chromatography. Components differ in their interaction with mobile and stationary phases.