Question

The oxidation number of $Fe$ and $S$ in iron pyrites are.

• A. 4, – 2
• B. 2, – 1
• C. 3, – 1.5
• D. 3, – 1

Answer 1

Answer: (A)

4, – 2

Answer 2

$\overset{*}{Fe} ⥂ S_{2}$ $Fe ⥂ \overset{*}{S_{2}}$

$x - 4 = 0$ $4 + 2x = 0$

$x = + 4$ $2x = - 4$

$x = \frac{- 4}{2} = - 2$.