Ответы на вопрос:
1.
2CH4=C2H2+3H2
3C2H2=C6H6
C6H6+HONO2=C6H5NO2+H2O
2.
CH4+Br2=CH3Br+HBr
2CH3Br+Na=C2H6+2NaBr
C2H6=C2H4+H2
3.
C2H5OH=C2H4+H2O
C2H4+H2=C2H6
C2H6+Cl2=C2H5Cl+HCl
4.
C2H4+Br2=CH2(Br)-CH2(Br)
CH2Br-CH2Br+2KOH=C2H2+2KBr+2H2O
C2H2+H2O=CH3CHO
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