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Q.
Carbon cannot be used to produce magnesium by chemical reduction of MgO because:
The p-Block Elements
Solution:
Carbon cannot be used to produce magnesium by chemical reduction of $MgO$ because magnesium reacts with carbon to form carbides.
$2 Mg +3 C \xrightarrow{2000^{\circ} C } Mg _{2} C _{3}$