Question

What is oxidation state of iron in potassium ferrate?

• A. +3
• B. +4
• C. +6
• D. +2

Hint:

Ferrate compounds are rare examples where iron shows +6 oxidation state.

Answer 1

The Correct Option is C

Step 1: Writing the formula of potassium ferrate.
Potassium ferrate has the formula \( \mathrm{K_2FeO_4} \).

Step 2: Assigning oxidation states.
Potassium has oxidation state +1 and oxygen has oxidation state –2.

Step 3: Calculating oxidation state of iron.
\[ 2(+1) + x + 4(-2) = 0 \] \[ 2 + x - 8 = 0 \] \[ x = +6 \]

Step 4: Conclusion.
Thus, the oxidation state of iron in potassium ferrate is +6.