With which of the following substances does barium hydroxide solution react: iron (2) chloride, copper, carbon monoxide

With which of the following substances does barium hydroxide solution react: iron (2) chloride, copper, carbon monoxide (4), sodium oxide? Draw up the equations of possible reactions in molecular and ionic form.

Barium hydroxide is an alkali (soluble base). It reacts with acidic oxides to form salt and water and soluble salts if one of the reaction products is insoluble.
Carbon monoxide (4) is an acidic oxide, and iron (2) chloride is a soluble salt.
1) Ba (OH) 2+ CO2 = BaCO3 + H2O
Ba + 2OH + CO2 = BaCO3 + H2O
2) Ba (OH) 2 + FeCl2 = BaCl2 + Fe (OH) 2
Ba + 2OH + Fe + 2Cl = Ba + 2Cl + Fe (OH) 2
Fe + 2OH = Fe (OH) 2