Цепочка превращений).CH4 →C2H2 → CH3CHO→ CH3COOH→ CH2CL- COOH
2CH4-->C2H2+3H2 C2H2+H2O-->CH3COH CH3COH+Ag2O-->CH3COOH+2Ag CH3COOH+CL2-->CH2CLCOOH+HCL