Testing for alcohols, aldehydes, alkenes and carboxylic acids
| Functional group | Reagent | Result |
| Alkene | Bromine water | Orange colour decolourises |
| Aldehyde | Fehling’s solution | Blue solution to red precipitate |
| Aldehyde | Tollen’s reagent | Silver mirror formed |
| Carboxylic acid | Sodium carbonate / sodium hydrogencarbonate | Effervescence, CO2 made |
| 10 and 20 alcohol, and aldehyde | Sodium dichromate and sulphuric acid | Orange to green colour change |
| Chloroalkane | Warm with silver nitrate | Slow formation of white precipitate (AgCl) |
| Bromoalkane | Warm with silver nitrate | Slow formation of cream precipitate (AgBr) |
| Iodoalkane | Warm with silver nitrate | Slow formation of pale yellow precipitate (AgI) |
| Acyl chloride | Silver nitrate | Vigorous reaction, steamy fumes of HCl, rapid production of white precipitate (AgCl) |