A student sets up a paper chromatography experiment. The level of the solvent in the beaker is above the start line.
What will happen to the spots on the start line?
They will dissolve into the solvent in the beaker instead of moving up the paper.
They will move up the paper more quickly and separate into more spots.
They will stay on the start line because the solvent cannot move up the paper.
They will react with the solvent and change colour as the solvent rises.
51 exam-style questions on OCR GCSE Chemistry 2.1 Purity and separating mixtures, covering 2.1.1 Pure substances and melting point data, 2.1.2 Relative formula mass and empirical formula, 2.1.3 Formulations as useful mixtures, 2.1.4 Techniques for separating mixtures, and 2.1.5 Chromatography and Rf values. Each one has a worked solution and a mark scheme showing where the marks go.