Multiple choice

In which of the following compounds is iron in its lowest oxidation state?

  1. Fe2O3

  2. Na2[Fe(CO)4]

  3. Fe(CO)5

  4. Fe(OH)2

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In Fe(CO)5, iron is in zero oxidation state. x + 0 = 0 So, x = 0