Assignment

1. You have a sample that is known to be either benzophenone (has a carbonyl plus aromatics) or naphthalene (only aromatics). What is a quick, easy, spectroscopic way to find out?

   1. NMR
   2. Mass spectroscopy
   3. UV/Vis
   4. Refractive index
   5. IR

2. p-dichlorobenzene boils at 54–56°C; Cyclohexane boils at 80.7°C; which will elute from a GC column first?

   1. Cyclohexane
   2. Neither – liquids aren't used in gas chromatography
   3. p-dichlorobenzene

3. Which is not a commonly used drying agent?

   1. Sodium sulphate
   2. Magnesium sulphate
   3. Sodium chloride
   4. Calcium chloride

4. A modified version of column chromatography is:

   1. Flash column chromatography
   2. Paper chromatography
   3. Thin layer chromatography
   4. Gas chromatography