Which element is not present in chlorophyll?

Carbon

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Calcium

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Magnesium

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Hydrogen

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Solution

The correct option is B Calcium
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. There are several forms of chlorophyll.
So, an element not present in chlorophyll is calcium.
So, the correct answer is option B.

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