The decolourization of purple colour of tetraoxomanganate (VII) ion is a test for? by Sunday | Oct 14 | Chemistry JAMB | 0 comments A. alkenes B. alkanols C. alkanals D. alkanes Correct Answer: Option A – alkenes Users Also Read These:Elactrostatic force of attraction between sodium ion…Ethene decolourises acidified potassium…The following will decolourize acidified potassium…The following compounds decolourize acidified…Assuming that brown colour is dominant over black…