1. What are dependent variables of a van-Deemter plot 2. What is a dynamic range prblem and how does it affect the efficiency of a chromatographic analysis? 3. Why does a TCD respond to all analytes except the carrier gas? 4. What are the relative advantages and disadvantages of packed and open tubular columns in GC? 5. Predict the elution order of the following analytes from a Carbowax 20 M column: hexane, acetaldehyde, octane, benzene, toluene, ethylbenzene, o-xylene and butanol?