Test - add bromine water
Result - bromine water will turn from brown to colourless
Test - add solid phosphorous pentachloride to the anhydrous compund
Result - steamy fumes of hydrogen chloride will be produced
Test - Warm unknown with aqueous sodium hydroxide for several minutes, don't boil. Allow solution to cool and then add nitric acid until the solution is just acidic to litmus. Then add silver nitrate solution.
- Give same results as anion tests of chlorides, bromide, iodides.
If all other tests negative, it is an alkane.