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:The salt that reacts with dilute hydrochloric acid…The colour of the solution formed when ethyne reacts…A purple colour was obtained when sodium hydroxide…The following will decolourize acidified potassium…When ammonia and hydrogen ion bond together to form…