A) \[Mg\]
B) \[Ca\]
C) \[Fe\]
D) \[Ni\]
Correct Answer: A
Solution :
\[Mg\]does not occur in the native state, Its important minerals are (i) Magnesite \[MgC{{O}_{3}}\] (ii) Dolomite \[MgC{{O}_{3}}.CaC{{O}_{3}}\] (iii) Epsom salt \[MgS{{O}_{4}}.7{{H}_{2}}O\] (iv) Carnallite \[MgC{{l}_{2}}.KCl.6{{H}_{2}}O\] (v) Kainite \[{{K}_{2}}S{{O}_{4}}.MgS{{O}_{4}}.MgC{{l}_{2}}.6{{H}_{2}}O\] etc. Magnesium chloride is present in sea water while \[MgS{{O}_{4}}\]is found in many mineral spring. It is widely distributed in the vegetable kingdom being present in chlorophyll, the green colouring matter of the leaves.
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