Can someone classify each of the following reactions

CaO(s) + H2O -> Ca(OH)2 (aq)
Fe(s) + CuSO4(aq) -> FeSO4(aq) + Cu(s)
NH4NO3(s) -> N2O(g) + 2H2O(g)

Thanks!

CaO(s) + H2O -> Ca(OH)2 (aq) === synthesis, there is only one product
Fe(s) + CuSO4(aq) -> FeSO4(aq) + Cu(s) === single replacement, an element and compound on each side
NH4NO3(s) -> N2O(g) + 2H2O(g) === decomposition, there is only one reactant