Вопрос:

Ответ:

1) CH4 + Cl2 → CH3Cl + HCl
2) 2CH3Cl + 2Na → CH3CH3 + 2NaCl
3) CH3CH3 → C2H4 + H2
4) 3C2H4 → C6H6 + 3H2
5) C6H6 + Cl2 → C6H5Cl + HCl