1) Explain what simple test can be performed to show that 3-chlorobenzoic acid is not eluted from the chromatography column? TLC possibly?
2) Forecast the order of elution of a mixture of triphenylmethanol, biphenyl, benzoic acid and methyl benzoate from an alumina column. The non-polar compounds elute first?
3) As soon as a chromatographic column is ready, why would it be significant to allow the level of liquid in the column to drop to the level of the alumina previous to applying the solution of the compound to be separated?