Ответ:

2CH4→CH≡CH+3H2 (t°,kat)

CH≡CH+2H2→CH3-CH3 (t°,Pt)

CH3-CH3+B2→CH3-CH2-Br+HBr (свет)

CH3-CH2-Br+KOH→CH3-CH2-OH+KBr (t°, H2O)

CH3-CH2-OH+CuO→CH3-CHO+Cu+H2O (t°)

CH3-CHO+2Cu(OH)2→CH3-COOH+Cu2O↓+3H2O (t°)

CH3-COOH+CH3OH→CH3-COOCH3+H2O (t°, H2SO4)

2CH3-COOCH3+7O2→6CO2+6H2O (t°)

Объяснение: