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:Ethene decolourises acidified potassium…Assuming that brown colour is dominant over black…Why is the ion Na+ form in normal chemical reactions…The colour of the solution formed when ethyne reacts…Assuming that in sheep, the allele for black coat…