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Q.

Haemoglobin, a complex containing iron is a constituent of blood. The oxidation state of iron in the complex is

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a

+1

b

+2

c

+3

d

+4

answer is B.

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Detailed Solution

  • Iron atom in the Haemoglobin of blood is in the +2 Oxidation state. ie., Iron is present as Fe(II) ion.
     
  • If it is present in the +3 Oxidation state, then it cannot coordinate with the oxygen atom.
  • The oxidation state of Fe in Hemoglobin is +2.
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