What quantity of electrons is lost when one mole of iron (II) ions is oxidized to iron (III)?

A. 0 mole
A. 3 moles
B. 1 mole
C. 2 moles

Correct Answer:

Option B = 1 mole

Explanation

Fe²⁺ → Fe³⁺

The pale green Fe²⁺ is oxidized to orange Fe³⁺ because it loses an electron.