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Chromatography and qualitative analysis

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12
Question 2

Which statement(s) is/are correct for gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS)?

  1. In gas-liquid chromatography, the mobile phase is an inert carrier gas and the stationary phase is a high-boiling liquid adsorbed onto an inert solid support.
  2. The area under each peak on a gas chromatogram is directly proportional to the retention time of that component in the column.
  3. When coupled with a mass spectrometer (GC-MS), the mass spectrum of each separated component can be compared against a spectral library database to identify the substance.
A

1, 2 and 3

B

Only 1 and 3

C

Only 2 and 3

D

Only 1

Markscheme

Chromatography and qualitative analysis Questions

  1. A Level
  2. /Chemistry
  3. /Chromatography and qualitative analysis

6 exam-style questions on OCR A A Level Chemistry Chromatography and qualitative analysis. Each one has a worked solution and a mark scheme showing where the marks go.

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