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Coordination Compounds question

2004 · Shift 0 · Q49
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Coordination Compounds question

2004 · Shift 0 · Q49

JEE MainChemistryCoordination CompoundsMCQ+4 / −1
Coordination compound have great importance in biological systems. In this context which of the following statements is incorrect?
  1. A
    Chlorophylls are green pigments in plants and contains calcium
  2. B
    Carboxypeptidase – A is an enzyme and contains zinc
  3. C
    Cyanocobalamin is B12 and contains cobalt
  4. D
    Haemoglobin is the red pigment of blood and contains iron
View written solutionFree

Correct answer: A

  1. We check each statement about biologically important coordination compounds.

  2. Option A: Chlorophyll is the green pigment in plants.

    • Chlorophyll contains magnesium at the center of the porphyrin-like ring, not calcium.
    • Therefore, this statement is incorrect.

  3. Option B: Carboxypeptidase-A is an enzyme containing zinc.

    • Carboxypeptidase-A is a zinc-containing metalloenzyme.
    • Hence, this statement is correct.

  4. Option C: Cyanocobalamin is vitamin B12B_{12}B12​ and contains cobalt.

    • Vitamin B12B_{12}B12​ compounds are corrinoids with cobalt as the central metal ion.
    • So this statement is correct.

  5. Option D: Haemoglobin is the red pigment of blood and contains iron.

    • Hemoglobin contains iron in the heme group.
    • Thus, this statement is correct.

  6. Therefore, the incorrect statement is: A\boxed{\text{A}}A​

  7. Comparison with stored correct answer:

    • Stored correct answer = A
    • Derived answer = A
    • They match.
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