Степень окисления H всегда равна +1 .
C= -4
H4= +1
А.)CH4+Cl2(свет)=CH3Cl+HCl
2CH3Cl+2Na=2NaCl+CH3-CH3
C2H6+Cl2=C2H5Cl+HCl
2C2H5Cl+2Na=2NaCl+C4H10
C4H10(AlCl3)=CH3-CH-CH3
CH3
б)Al4C3+12H2O=4AL(OH)3+3CH4
CH4+Br2=CH3Br+HBr
2CH3Br+2Na=2NaBr+C2H6
C2H6=C2H4+H2
в.)CH3COOH + Na[HCO3]<span> → CH</span>3COONa+ H2O + CO<span>2
</span>CH3COONa(тв)+NaOH(тв)=сплав CH4+Na2CO3
CH4+HONO2=CH3NO2+H2O
Г.)C2H6+Br2=C2H5Br+HBr
2C2H5Br+2Na=2NaBr+C4H10
C4H10(AlCl3)=CH3-CH-CH3
CH3
Br
CH3-CH-CH3+Br2=HBr+CH3-CH-CH3
CH3 CH3
1) 2MgO+2SO₂ → 2MgO+4SO
2) 3Al₂O₃+3HNO₃ → 5AlO+6HNO
3) 2K₂O+6CaO → 2KO+6CaO
думаю правильно