Alkenes + bromine Br2 - Brown colour disappears quickly, Alkanes + bromine Br2 - Brown colour disappears slowly with UV light, Alcohols + acidified dichromate (Cr2O7-2)  - Orange solution turns green, Alkenes + acidified permanganate (MnO4 -) - Purple solution turns colourless, Carboxylic acids + litmus paper - Blue litmus turns red, Amines + litmus paper - Red litmus turns blue,

Testing for Hydrocarbons - Colour Changes

Leaderboard

Visual style

Options

Switch template

Continue editing: ?