Цепочка превращения.   CO = C3H8 = пропен =(+H2O, H, t) X= пропен=(+KMnO4, H2O, 20°)X2 

1) 6CO+8H2=2C3H8+O22) C3H8 -> t -> C3H6 + H23) CH2=CH-CH3 + H2O -> CH3-CHOH-CH34) CH3-CHOH-CH3 -> t -> CH2=CH-CH3 + H2O5) 3CH2=CH-CH3 + 2KMnO4 + 4H2O -> 3CH2OH-CHOH-CH3 + 2MnO2 + 2KOH Прошу вас.