NEET UG CHEMISTRY MCQ: HYDROGEN

Option C (${H_2}O\mathrm{ }\,\mathrm{and}\,\mathrm{ }\left( {{H_2}O + {O_2}} \right)$) is correct because in acidic medium, hydrogen peroxide oxidizes ${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{4 - }}$ to ${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{3 - }}$ producing water, and in alkaline medium, it reduces ${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{3 - }}$ to ${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{4 - }}$ producing water and oxygen.