Reduction potentials of some ions are given below. Arrange them in decreasing order of oxidising power.

REDUCTION POTENIAL: reduction potential is a measure of the ease with which a molecule will accept electrons.


OXIDISING POWER: it is the ability to gain electrons.


Therefore oxidizing power is directly proportional to reduction potential.


Greater is the reduction potential, more will be its oxidizing power.


Hence the order is BrO4> IO4>ClO4


Thus the correct option is (iii).

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