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Question 740014
JEE Chemistry · Easy

Coordination Compounds: Mixed MCQ

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MixedEasyQuestion 740014

Question

The central metal ion in haemoglobin is:
  1. A
    Fe²⁺
    Correct
  2. B
    Mg²⁺
  3. C
    Cu²⁺
  4. D
    Co²⁺

Correct answer

Fe²⁺

Explanation

Haemoglobin contains Fe²⁺ at the centre of the porphyrin ring (heme group). It binds O₂ reversibly. In CO poisoning, CO binds Fe²⁺ much more strongly than O₂.

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