Question

Va rog ajutatima la chimie: CH3-CH3+Cl2=A
A+KOH=B
B+Cl2=C
C+KOH=D
D+?=CH3-CH3.

Answer 1

CH3-CH3 + Cl2 = Cl-CH2-CH3 + HCl
Cl-CH2-CH3 + KOH= CH2 = C2H4 +  KCl + H2O
C2H4+ Cl2= Cl-CH2-CH2-Cl
Cl-CH2-CH2-Cl + 2KOH= CH2=CH2+  CH2OH-CH2OH+ 2KCl
CH2=CH2 + H2= CH3-CH3