**Match Column I (Species) with Column II (Oxidation state of the central metal atom):**
**Column I:**
(A)
(B)
(C)
(D)
**Column II:**
(p) +2
(q) +3
(r) +1

Question

**Match Column I (Species) with Column II (Oxidation state of the central metal atom):**
**Column I:**
(A) $[Fe(H_2O)_5NO]SO_4$
(B) $K_3[Fe(CN)_6]$
(C) $K_4[Fe(CN)_6]$
(D) $Fe(CO)_5$
**Column II:**
(p) +2
(q) +3
(r) +1
(s) 0

Prashant Kotian · Accepted Answer

Correct answer: A. **Logic:**
(A) In the brown ring complex, is , making have an O.S. of +1.
(B) : .
(C) : .
(D) Metal carbonyls have the metal in zero oxidation state.

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