quiz
2/10
2. ___________ is the excellent carrier gas used in GC
- A) oxygen
- B) nitrogen
- C) helium
- D) nitrogen
4/10
4. The choice of carrier gas is often dependant upon the type of _________ which is used
- A) column
- B) detectors
- C) sample
- D) temperature
5/10
5. Most packed columns are ________ in length
- A) 1.6 - 10m
- B) 1.8 - 9m
- C) 1.5 - 11m
- D) 1.5 - 10m
6/10
6. Column temperature must be controlled to within ________ of a degree
- A) fifths
- B) tenths
- C) sevenths
- D) sixths
7/10
7. The optimum column temperature is dependant upon the __________ of the sample.
- A) boiling point
- B) melting point
- C) density
- D) solubility
8/10
8. Packed columns have an internal diameter of ___________
- A) 4 - 2mm
- B) 2 - 4cm
- C) 2 - 4mm
- D) 2 - 6mm
9/10
9. When the carrier gas alone is passing they give a ________ signal
- A) zero
- B) one
- C) two
- D) three
10/10
10. Hydrogen has more advantages but not used as carrier gas this is due to
- A) dangerous
- B) expensive
- C) low sensitivity
- D) inexpensive
Finished!
Please select an option