The compound which could not act both as oxidizing as well as reducing agent is
A
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B
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C
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D
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Solution
The correct option is C Barrring aluminium, all the other metals here show at least 3 oxidation states, which would make it possible for them to act as both oxidising and reducing agents. S:0,+4,+6Mn:0,+2,+4,+6,+7Al:0,+3Cr:0,+3,+6
Hence, Al2O3 cannot act as oxidizing as well as reducing agent.