①燃烧: CnH2n+( )O2
nCO2+nH2O
CnH2n-2+( )O2
nCO2+(n-1)H2O
RCH=CHR/+X2
RCH CHR/+X2
+2X2
RCH CHR/
nCH2=CH2
nCH2=CH-CH=CH2
CH CH + HCl
nCH2=CHCl
同类反应:RCH2CH2OH
RCH=CH2 + H2O
同类反应:ZnC2+2H2O
Zn(OH)2+C2H2↑
Mg2C3+4H2O
2Mg(OH)2+C3H4↑