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Hydrogen peroxide oxidises [Fe(CN) 6 ] 4– to [Fe(CN) 6 ] 3– in acidic medium but reduces [Fe(CN) 6 ] 3– to [Fe(CN) 6 ] 4– in alkaline medium. The other products formed are, respectively.

1. (H 2 O + O 2 ) and H 2 O
2. (H 2 O + O 2 ) and (H 2 O + OH – )
3. H 2 O and (H 2 O + O 2 )
4. H 2 O and (H 2 O + OH – ) Students may find similar question in CP exercise sheet : [ JEE Main, Chapter : Hydrogen & Its compounds, Theory notes page 7 ]

Correct answer: H 2 O and (H 2 O + O 2 )

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