Which of the following is the correct decreasing order of oxidizing power of perhalate ions?

Step-by-step solution

The oxidizing power of perhalate ions depends on their standard reduction potentials. A higher positive standard reduction potential indicates a stronger oxidizing agent. The standard reduction potentials ( E^ ) for the reduction of perhalate ions to halate ions in acidic medium are: E^ ( BrO ₄^- / BrO ₃^-) = +1.74 V E^ ( IO ₄^- / IO ₃^-) = +1.65 V E^ ( ClO ₄^- / ClO ₃^-) = +1.20 V Since the reduction potential is highest for BrO ₄^- and lowest for ClO ₄^- , the decreasing order of oxidizing power is BrO ₄^- > IO ₄