Carry out transformations: methane-ethane-ethene-ethanol-carbon dioxide.

methane – ethane (Wurtz reaction):
CH4 + Cl2 = CH3Cl + HCl;
2CH3Cl + Na = C2H6 + NaCl;
ethane – ethen:
C2H6 = C2H4 + H2 (catalysts: nickel, platinum);
ethene – ethanol:
C2H4 + H2O = C2H5OH (catalyst: H2SO3);
ethanol – carbon dioxide (combustion reaction):
C2H5OH + 3O2 = 2CO2 + 3H2O.

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