1.

Which of the following has magnesium?A. Vitamin`-B_(12)`B. chlorophyllC. HaemocyaninD. Carbonic anhydrates

Answer» Correct Answer - B
Formula of chlorophyll is `C_(55)H_(72)MgN_(2)O_(6)`.so Mg is present in chlorophyll. It is the green colouring matter of leaves and green stems. Vitmin -`B_(12)` contains cobalt, haemocyanin contains copper and carbonic anydrates contains zinc.


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