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6. What is the definition of retention time?

  • The length (in metres) that the components travel through the column
  • The length (in cm) that the components travel through the column
  • Time taken for the component to pass through the column to the detector
  • Time taken for the component to pass through the detector to the column

7. What is the stationary phase in TLC?

  • Solid
  • Liquid
  • Gas
  • Aqueous

8. What is the most distinguishable peak in an infrared spectrum of a Carboxylic acid?

  • The broad peak between 3200-3500 cm-1
  • The very broad peak between 2500-3300 cm-1
  • The peak between 1640-1750 cm-1
  • The peak between 1000-1300 cm-1

9. TMS (tetramethylsilane) is used in NMR because........

  • It doesnt produce a peak
  • It is the reference value for chemical shifts
  • It is the chemical shift value
  • It is not affected by nuclear spin

10. What is the stationary phase in GC (gas chromatography)?

  • Solid or gas
  • Liquid or solid
  • Liquid or gas
  • Solid or aqueous solution

11. What is the process of separation in TLC (thin layer chromatography)?

  • Adsorption
  • Solubility
  • Absorption
  • Relative Solubility