Oxygen is not evolved when:
Ammonium nitrate is heated
Zinc oxide is treated with NaOH
Heating KClO3 yields oxygen - as does the reaction between sodium peroxide and water:
2KClO3Δ−→2KCl+3O2↑
2Na2O2+2H2O⟶4NaOH+O2↑
The other options:
ZnO+2NaOH+H2OΔ−→Na2[Zn(OH)4]
NH4NO3Δ−→N2O+H2O