CH2=CH-CH=CH2+2H2=(Pt,t)=CH3-CH2-CH2-CH3
CH3-CH2-CH2-CH3=(AlCl3,t)=CH3-CH(CH3)-CH3
CH3-CH(CH3)-CH3+Br2=(hv)=CH3-CBr(CH3)-CH3+HBr
CH3-CBr(CH3)-CH3+KOH(спирт,р-р)=KBr+H2O+CH3=C(CH3)-CH3
CH3=C(CH3)-CH3+KMnO4+H2SO4=CH3-C(O)-CH3+CO2+K2SO4+MnSO4(уровнять нужно)