Chain of transformations: CH4 > C2H2 > CH3-COH > CH3-CH2-OH > CH3-CH2-Br > C2H4 > CH3-CH2-OH > CH3-CO4 > CH3-COOH > CH3-COONa
Chain of transformations: CH4 > C2H2 > CH3-COH > CH3-CH2-OH > CH3-CH2-Br > C2H4 > CH3-CH2-OH > CH3-CO4 > CH3-COOH > CH3-COONa