Question

C---C2H2---C2H4---HO-CH2-CH2-OH---HOOC-COOH щавелевая кислота

Answer 1

1)2C+H2=kat=C2H22)
C2H2+H2=kat=C2H4
3)C2H4+((O)KMnO4)===OH-CH2-CH2-OH
4)OH-CH2-CH2-OH+Cu(OH)2==t==HOOC-COOH