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C2H2+H2====C2H4
C2H2+Br2=====C2H2Br2
C2H2+Cl2======C2H2Cl2
C2H2+2HCl======C2H4Cl2
ETEN
C2H4+H2===C2H6
C2H4+Br2===C2H4Br2
C2H4+Cl2===C2H4Cl2
C2H4+2HCl====C2H6Cl2
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