Răspuns:
2CH4 → C2H2 + 3H2
C2H2 + H2 → CH2= CH2 ( Pd/ Pb⁺²) etena
CH2= CH2 + H2O → CH3- CH2OH
3CH3- CH2OH + K2Cr2O7 + 4H2SO4 -→ 3CH3- CHO + K2SO4 +
Cr2 (SO4)3 +7 H2O timp de contact scurt
CH3- CHO + CH3- CHO → CH3- CH = CH - CHO + H2O condensare aldolica
CH3- CH = CH - CHO + 2H2 -→CH3- CH2 -CH2 - CH2OH
3 CH3- CH2 -CH2 - CH2OH + 2 K2Cr2O7 + 8H2SO4 -→
3CH3- CH2 -CH2 - COOH +2 K2SO4 + 2Cr2 (SO4)3 + 11H2O
Explicație: