1) C2H6+Br2=C2H5Br+HBr
C2H5Br+KOH=C2H5OH+KBr
C2H5OH+CuO=CH3CHO+Cu+H2O
2) C6H6+CH3Cl=C6H5CH3+HCl
5 C6H5CH3 + 6 KMnO4 + 9 H2SO4 = 5 C6H5COOH + 6 MnSO4 + 3 K2SO4 + 14 H2O
C6H5COOH+H2=C6H5CHO+H2O
3) CH2=Ch-CH3+H2O=CH3-CH(OH)-CH3
CH3-CH(OH)-CH3+CuO=CH3-CO-CH3+Cu+H2O