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Tutor HuntTest QuestionsChemistry QuestionsYear 10 Chemistry Questions

 

Chromatography (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Chromatography' from the broader topic Chemical Analysis. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

A student records the following: distance moved by dye = 2.4 cm; distance moved by solvent = 6.0 cm. Which multiple-choice answer is the correct Rf and correct explanation?
A dye has polar functional groups and is run on silica gel (polar stationary phase) with a nonpolar solvent. Which outcome is most likely?
A student calculates Rf = 0.48 for a spot that moved 5.4 cm. What was the solvent front distance?
How can chromatography be used to test for purity of a compound?
Which factor would NOT normally improve resolution between two close spots in chromatography?
What is the Rf value if a dye spot moves 3.6 cm from the start line and the solvent front moves 9.0 cm?
How should the start line be positioned relative to the solvent in paper chromatography?
In thin-layer chromatography, which action helps visualize spots that are not visible?
If two components have Rf values 0.30 and 0.33 on one solvent system, what is the simplest practical step to try to separate them better?
In paper chromatography which factor most directly affects how far a component travels up the paper?
A chromatography experiment shows two spots for a supposedly pure dye. Which conclusion is most likely?