SC-731
Chromatography
Lower Sec Science · Secondary 1 · Hard · Chromatography
In a chromatography experiment, a student forgets to cover the beaker with a lid. What is the main reason why a lid is usually used?
- To reduce evaporation of the solvent and improve separation
- To stop the colours from dissolving in the solvent
- To make the solvent move faster up the paper
- To keep the starting line below the solvent
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