Chromatography

Last updated: 05/03/2020

WJEC A-Level Chemistry Unit 4.8 – Organic synthesis and analysis Chromatography

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Question 1 of 25

1. Question
What is chromatography?
- The separating and identifying the components in a mixture.
- The distilling and purifying of inorganic compounds.
- The separating and identifying of a mixture.
- The breaking up of a mixture
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Question 2 of 25

2. Question
What is the definition of the mobile phase?
- Carries soluble components of the mixture.
- Holds back the components in the mixture that are attracted to it.
- Carrying insoluble components within the mixture.
- Attracts solubles components
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Question 3 of 25

3. Question
What is the definition of the stationary phase?
- Holds back the components in the mixture that are attracted to it.
- Carries soluble components of the mixture.
- Carrying insoluble components within the mixture.
- Attracts solubles components
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Question 4 of 25

4. Question
What is the definition of a retention factor?
- Time taken for the components to be detected within a gas chromatogram
- Time taken for the gas to be collected within a gas chromatogram.
- Time taken for the oil to be released within a gas chromatogram
- Time taken for the capillary tube to empty within a gas chromatogram.
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Question 5 of 25

5. Question
What does Rf stand for?
- Retention factor
- Rentention fix
- Resource fixture
- Resonance factor
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Question 6 of 25

6. Question
What is the purpose of Rf values?
- To identify components
- To identify the mixture
- To identify the mobile phase
- To identify the stationary phase
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Question 7 of 25

7. Question
What does TLC stand for?
- Thin-layer chromatography
- Testing layered contact
- Thin-lasting chromatography
- Timed layer chromatography
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Question 8 of 25

8. Question
What is the definition of thin-layer chromatography?
- When a plate is coated with a solid and a solvent moves up the plate.
- When a plate is filled with a liquid and a solid is added.
- When a column is packed with a solid or a solid coated with a liquid and a gas is passed through the column.
- When a column is packed with a solid and a solvent moves down the column.
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Question 9 of 25

9. Question
What is the mobile phase within thin-layer chromatography?
- Solvent
- Pencil
- Ink
- Silica gel
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Question 10 of 25

10. Question
What is the stationary phase within thin-layer chromatography?
- Silica gel
- Pencil
- Ink
- Solvent
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Question 11 of 25

11. Question
When completing thin-layer chromatography, how are Rf values calculated?
- Distance moved by spot / distance moved by solvent
- Distance moved by spot x distance moved by solvent
- Distance moved by solvent / distance moved by spot
- Distance moved by solvent / distance moved by water
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Question 12 of 25

12. Question
What does CC stand for?
- Column chromatography
- Coated chromatography
- Common chromatography
- Contact chromatography
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Question 13 of 25

13. Question
What is the definition of column chromatography?
- When a column is packed with a solid and a solvent moves down the column.
- When a column is packed with a solid or a solid coated with a liquid and a gas is passed through the column.
- When a plate is coated with a solid and a solvent moves up the plate.
- When a plate is filled with a liquid and a solid is added.
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Question 14 of 25

14. Question
What is the mobile phase within column chromatography?
- Solvent
- Narrow tube
- Powder
- Wool
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Question 15 of 25

15. Question
What is the stationary phase within column chromatography?
- Powder
- Narrow tube
- Solvent
- Wool
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Question 16 of 25

16. Question
What does GC stand for?
- Gas chromatography
- Gas column
- Gas contact
- Gained chromatography
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Question 17 of 25

17. Question
What does GC-MS stand for?
- Gas chromatography-mass spectrometry
- Gas column-mass standard
- Gas column-measurement standard
- Gas chromatography-mass spectra
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Question 18 of 25

18. Question
What is the definition of gas chromatography?
- When a column is packed with a solid or a solid coated with a liquid and a gas is passed through the column.
- When a column is packed with a solid and a solvent moves down the column.
- When a plate is coated with a solid and a solvent moves up the plate.
- When a plate is filled with a liquid and a solid is added.
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Question 19 of 25

19. Question
What is the mobile phase within gas chromatography?
- Gas
- Oil
- Powder
- Injection
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Question 20 of 25

20. Question
What is the stationary phase within gas chromatography?
- Powder
- Gas
- Oil
- Injection
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Question 21 of 25

21. Question
During gas chromatography, what is the powder placed in?
- A capillary tube
- Beaker
- A detector
- An injection
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Question 22 of 25

22. Question
How are the results when carrying out gas chromatography shown?
- Via a graph
- Via a table
- Via proton NMR
- Via carbon NMR
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Question 23 of 25

23. Question
During gas chromatography, what does the area under each peak represent?
- The amount of the component
- Type of atoms in mixture
- Amount of the mixture
- Time taken for the component to reach the detector.
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Question 24 of 25

24. Question
Which instrument does gas chromatography take place in?
- Oven
- Sample injection
- Paper
- Column
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Question 25 of 25

25. Question
How is information on each component found during gas chromatography?
- By an oven
- By a column
- By a detector
- By a capillary
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