This is a series of chemical reactions that start with calcium carbonate (CaCO3) and end with ethyl alcohol (C2H5OH):

CaCO3 -> CaO + CO2 (calcium carbonate decomposes to form calcium oxide and carbon dioxide)CaO + C -> CaC2 (calcium oxide reacts with carbon to form calcium carbide)CaC2 + 2H2O -> C2H2 + Ca(OH)2 (calcium carbide reacts with water to form acetylene and calcium hydroxide)C2H2 -> C2H4 (acetylene undergoes hydrogenation to form ethylene)C2H4 + H2O -> C2H5OH (ethylene undergoes hydration to form ethanol)