Question

Oxidation state of iron in haemoglobin is:

• A. $0$
• B. $+2$
• C. $-2$
• D. $+3$

Answer 1

Answer: (B)

$+2$

Solution: Our blood contains red blood cells, and the red blood cells contains a pigment called haemoglobin. It contains four polypeptide chains and four haem groups attach to it. Therefore, it can react with molecules of oxygen to form oxyhaemoglobin.

Hence, the correct option is (B).