Electrode potential data of few cells is given below. Based on the data, arrange the ions…
Chemistry · Class 12 · CBSE — Electrochemistry
Electrode potential data of few cells is given below. Based on the data, arrange the ions in increasing order of their reducing power.
Fe3+(aq) + e– → Fe2+(aq) ; E° = +0.77 V
Al3+(aq) + 3e– → Al(s) ; E° = –1.66 V
Br2(aq) + 2e– → 2Br–(aq) ; E° = +1.09 V
Fe3+(aq) + e– → Fe2+(aq) ; E° = +0.77 V
Al3+(aq) + 3e– → Al(s) ; E° = –1.66 V
Br2(aq) + 2e– → 2Br–(aq) ; E° = +1.09 V
- Br– < Fe2+ < Al
- Fe2+ < Al < Br–
- Al < Br– < Fe2+
- Al < Fe2+ < Br–
Answer
(A) Br – 2+ < Al
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