What is the oxidation number of iron in [Fe(H₂O)₅(NO)⁺] SO₄

Options

(a) 5
(b) 1
(c) 7
(d) 4

Correct Answer:

1

Explanation:

[Fe(H₂O)₅ (NO)⁺] SO₄. ⇒ Fe(x) (H₂O)₃⁶(NO)⁺ = +2 ⇒ x + 1 = +2. ⇒ x = +1.