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:The oxidation state of oxygen in tetraoxosulphate…The change in the oxidation state of iron in the…The oxidation state(s) of nitrogen in ammonium…The oxidation state of carbon in HCOOH is?The oxidation state of chlorine in NaClO3 is?