Question
Convert limestone to calcium carbide.

Answer

$\text{CaCO}_3\xrightarrow{\text{heat}}\text{CaO}+\text{CO}_2\\ \text{Limestone}$
$\text{CaO}+3\text{C}\xrightarrow{1000^\circ\text{C}}\text{CaC}_2+\text{CO}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{Calcium}\ \text{carbide}$

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