№1)<span>3)H2SO4,HNO3,H3PO4
№2)</span><span>2)II
№3)1.-А
2.-В
3.-Г
4.-Б
№4)а)</span><span>C+O2=CO2
</span><span>CO2+H2O=H2CO3
б)</span><span>S + O2 = SO2
</span><span>SO2 + O3=SO3 + O2↑
</span><span>SO3 + H2O = H2SO4
в)</span><span>4B+3O2=2B2O3
B2O3+3H2O=2H3BO3
г)</span><span>2Ba+O2=2BaO
</span><span>BaO+H2O = Ba(OH)2</span>
1)CH3-CH2-COOH+C2H5OH
2)CH3-C---(тройная связь)-CH+Br2
3)CH4+F2
4)CH2=CH2+H2O
5)H-COO-C2H5+H2O
6)HCl-(тройная связь)-CH+HBr
7)CH3-CH=CH-CH3+H2
3) N2O3 - правильный ответ