JEE Main & Advanced
Chemistry
Hydrocarbons / हाइड्रोकार्बन
Question Bank
Alkene
question_answer
The disappearance of the characteristic purple colour of \[KMn{{O}_{4}}\] in its reaction with an alkene is the test for unsaturation. It is known as [CPMT 1989, 94; CBSE PMT 1990]