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  1. Chlorophyll is a naturally occurring chelate compound in which central metal is

  2. A.

     Copper

    B.

     Magnesium

    C.

     Iron

    D.

     Calcium

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    Answer : Option B

    Explanation :

    One such chelate is chlorophyll, the green pigment of plants. In chlorophyll the central ion is magnesium, and the large organic molecule is a porphyrin. The porphyrin contains four nitrogen atoms that form bonds to magnesium in a square planar arrangement.


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