1) CH3-CH=CH2 HBr -> CH3-CHBr-CH3
CH3-CHBr-CH3 + KOH -> CH3-CH=CH2 + KCl + H2O
CH3-CH=CH2 + Br2-> CH3-CHBr-CH2Br
CH3-CHBr-CH2Br + 2KOH -> CH3-C≡CH + 2KBr +2H2O
CH3-C≡CH + H2->CH3-CH=CH2
nCH3-CH=CH2 -> (-CH-CH2-)n
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CH3
2)C2H6->C2H4+H2
C2H4+HCl->C2H5Cl
C2H5Cl+KOH->C2H4+KCl+H2O
C2H4+HOH->C2H5OH
C2H5OH t(H+) -> C2H4 + H2O
C2H4+Br2->C2H4Br2