C2H2 + H2 => H2C = CH2
H2C = CH2 + H2O => CH3-CH2-OH
CH3-CH2-OH + CuO => CH3-COH + H2O
5CH3COH + 2KMnO4 + 3H2SO4 => 5CH3COOH + 2MnSO4 + K2SO4 + 3H2O
