Lesson 3.3.16
3.3.16 Chromatography Quiz: AQA Chemistry, Unit 3
20 questions
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Lesson 3.3.16, Chromatography: 20 multiple choice questions for the AQA Chemistry (7405), Unit 3: Organic chemistry, written with Revision Ninja.
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The 20 questions
-
What is the main analytical purpose of chromatography?
- Determining mass
- Measuring pH
- Separating mixtures
- Synthesising compounds
-
Which substance commonly forms the stationary phase on a thin-layer chromatography plate?
- Liquid solvent
- Carrier gas
- Mobile solvent
- Silica gel
-
Which phase flows down the column during column chromatography?
- Adsorbent phase
- Solid phase
- Mobile phase
- Stationary phase
-
What state of matter is the mobile phase in gas chromatography?
- Plasma
- Solid
- Liquid
- Gas
-
What property primarily determines how fast a solute moves in thin-layer chromatography?
- Molecular mass
- Relative solubility
- Melting point
- Boiling point
-
What is the Rf value of a spot that moves 2.5 cm when the solvent front moves 5.0 cm?
- 0.25
- 0.5
- 7.5
- 2.0
-
A spot moves 4.2 cm and the solvent front moves 7.0 cm. What is the Rf value?
- 0.60
- 1.67
- 0.40
- 0.33
-
Which measurement is compared against standard samples to identify compounds in gas chromatography?
- Chemical shift
- Retention time
- Rf value
- Peak intensity
-
In GC-MS, which technique identifies each component after separation?
- Infrared spectroscopy
- Mass spectrometry
- Thin-layer chromatography
- NMR spectroscopy
-
Which chromatographic technique can be used to separate and identify transition metal ions?
- Mass spectrometry
- Thin-layer chromatography
- Gas chromatography
- Infrared spectroscopy
-
A compound with a high Rf value on a TLC plate has a high affinity for which phase?
- Adsorbent phase
- Solid phase
- Mobile phase
- Stationary phase
-
A long retention time in gas chromatography shows a strong interaction with which phase?
- Gas phase
- Mobile phase
- Carrier gas
- Stationary phase
-
Which technique is used to locate colourless spots on a TLC plate?
- Flame ionisation
- Infrared radiation
- Mass spectrometry
- UV light exposure
-
Which chromatographic technique is best for separating a mixture of volatile alkanes?
- Column chromatography
- Thin-layer chromatography
- Gas chromatography
- Paper chromatography
-
Which technique is used with gas chromatography to definitively identify separated compounds?
- Infrared spectroscopy
- Mass spectrometry
- NMR spectroscopy
- Thin-layer chromatography
-
Thin-layer chromatography can be used in organic synthesis to identify which type of drug?
- Antacids
- Antibiotics
- Anaesthetics
- Analgesics
-
In column chromatography, which substance elutes from the column first?
- Highest boiling point
- Most dense
- Least strongly adsorbed
- Most strongly adsorbed
-
Which experimental technique is tested in AQA Chemistry Required Practical 12?
- Column chromatography
- Recrystallisation
- Gas chromatography
- Thin-layer chromatography
-
What physical state is the mobile phase in gas chromatography?
- Liquid
- Gas
- Aqueous solution
- Solid
-
What is the maximum possible Rf value in thin-layer chromatography?
- 0.5
- 1.0
- 0.0
- 10.0
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