Dioxygen directly reacts with nearly all metals and non-metals except some metals (e.g., Au, Pt) and — Redox Reactions and Volumetric Analysis Chemistry Question

Question

Dioxygen directly reacts with nearly all metals and non-metals except some metals (e.g., Au, Pt) and some noble gases and form oxide(s). Oxides can be simple (e.g., MgO, Al2O3) or mixed (Pb3O4, Fe3O4). Simple oxides can be classified on the basis of their acidic, basic or amphoteric character. An oxide that combines with water to give an acid is termed acidic oxide (e.g., SO2, Cl2O7, CO2, N2O5). For example, SO2 combines with water to give H2SO3, an acid. Gaseous non-metal (A) --O2 / approp. temp.--> P↑ --O2 / room temp.--> Q↑ --H2O--> R (oxy acid) + P↑ Solid non-metal (B) --O2 / approp. temp.--> X↑ --O2 / approp. catalyst & temp.--> Y↑ --H2O--> Z (oxy acid) + Heat