In the opal written-response scenario for Chromatography, explain how qualitative analysis supports this objective: Explain that separation depends on the distribution of substances between the mobile phase and the stationary phase..

A high-scoring answer should explain explain that separation depends on the distribution of substances between the mobile phase and the stationary phase. Use evidence before identification: name the relevant test or measurement, state the observation, and then connect the result to Chromatography.

The important distinction is that chromatography must be identified from spot and solvent-front distances; answers that swap in a different test or result do not match Chromatography. A complete answer should use the approved objective wording, include the relevant evidence, and avoid unsupported identification claims.