CHEMICAL TEST : BAEYER’S TEST
Used to identify the presence of C-C double bond in alkene or C-C triple bond in alkyne Purpose : Observation : General equation : Reagent and condition : KMnO4 , −OH, cold KMnO4 , −OH + MnO2 cold Purple colour of KMnO4 decolourised and brown precipitate formed. C C C C OH OH
KMnO4 , −OH cold + MnO2 Compound P Purple colour of KMnO4 decolourised and brown precipitate formed. EXERCISE: Reaction of compound P with cold dilute alkaline KMnO4 solution can be used as a confirmatory test for alkene. Name this test, state the observation and write the chemical equation involved. ANSWER : H2 C C CH2 CH2 CH3 CH2 CH3 CH2 C CH2 CH2 CH3 CH2 CH3 OH OH Baeyer’s Test H2 C C CH2 CH2 CH3 CH2 CH3 Compound P