The oxidation state of chlorine in HClO4 is? by Sunday | Oct 15 | Chemistry JAMB | 0 comments A. -5 B. -1 C. +1 D. +7 Correct Answer: Option D = +7 Users Also Read These:When chlorine is passed through a sample of water,…The change in the oxidation state of iron in the…The oxidation state of Cr in K2Cr2O7 is?The oxidation state(s) of nitrogen in ammonium…An oxidation state of Cr in K2Cr2O7?