When monochloroethane is made to react with aqueous NaOH, it forms:
Methyl alcohol
Ethyl alcohol
Methanal
Ethanal
When monochloroethane is hydrolyzed, the OH⎺ ion from water molecules displaces the Cl- to form ethyl alcohol. C2H5Cl+OH⎺→C2H5OH+Cl⎺