Which of the following species can function both as oxidising as well as reducing agent ?

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Cl-

ClO4-

ClO-

MnO4-

answer is C.

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Detailed Solution

1) Highest and lowest Oxidation state of 'Cl' in its compounds are +7 and -1 In Cl- chlorine is in -1 state so It can undergoes only oxidation but not reduction2) Highest and lowest Oxidation state of 'Cl' in its compounds are +7 and -1 In ClO4- chlorine is in +7 state so It cannot undergo oxidation3) Highest and lowest Oxidation state of 'Cl' in its compounds are +7 and -1 In ClO- chlorine is in +1 state so It can undergoes both oxidation and reduction4) In MnO4- , 'Mn' is in +7 state (its highest Ox. state)So MnO4- can not act like reducing agent

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