Помогите решить цепочки
1)ацетилен+H2O(Hg)--->X1--->K2Cr2O7(H2SO4)--->X2CaO--->ацетон H2(N2) X4
2)CH3-CH2-CH-Cl(Cl)+2KOH(H2O)--->X1+K2Cr2O7(H2SO4)---->CH3-CH2-COOH+Cl2--->X2+NaHCO3---->X3+CH3-CH2-Br--->X4
3)X1+Br2(свет)--->CH3Br+NH3(р-р)--->X2+HNO3--->X3--->CuO--->HCOH+KMnO4(H2SO4)---->X4
4) X1 C (акт.) t---> C6H6+Cl2(FeCl3)----X2--->X3----бензольное кольцо (CH3,No2)---->+KMnO4(H2SO4)--->X4