Объяснение:

2. А
3. В
4. А
5. А, В
6. А, Г
7. CH3COOH + NaOH = CH3COONa + H2O, 2CH3COOH + Mg = (CH3COO)2Mg + H2, CH3CH2OH + 3O2 = 2CO2 + 3H2O, CH3OH + НCl = CH3Cl + H2O
8. C2H2 + H2 (Pd) = C2H4; C2H4 + H2O (H2SO4) = C2H5OH; 2C2H5OH + 2Na = 2C2H5ONa + H2↑

9.

20г. хл 2CH3COOH +2K = 2CH3COOK +H2↑

2•39г/моль. 22.4л/моль

х=(20•22.4)÷(2•39)= 5.7 л