Total number of acidic oxides among \({\mathrm{N}}_{2}{\mathrm{O}}_{3},\text{ }{\mathrm{NO}}_{2},\text{ }{\mathrm{N}}_{2…

Total number of acidic oxides among \({\mathrm{N}}_{2}{\mathrm{O}}_{3},\text{ }{\mathrm{NO}}_{2},\text{ }{\mathrm{N}}_{2}\mathrm{O},\text{ }{\mathrm{Cl}}_{2}{\mathrm{O}}_{7},\text{ }{\mathrm{SO}}_{2},\text{ }\mathrm{CO},\text{ }\mathrm{CaO},\text{ }{\mathrm{Na}}_{2}\mathrm{O}\) and NO is

[JEE Main 2023, 29 Jan (Shift 2)]