Chemistry - Complete d-block Question with Solution | TestHub

Silver (Ag) is a highly unreactive noble metal located very low in the electrochemical series, making its salts thermally unstable. When heated strongly, silver nitrate undergoes complete thermal decomposition to yield pure silver metal, nitrogen dioxide, and oxygen gas:

$$2AgN{O}_3\stackrel{\Delta }{\to }2Ag+2N{O}_2+O_2$$

In contrast, options like CaCO₃ and ZnCO₃ decompose to form stable metal oxides (CaO and ZnO), while KNO₃ decomposes to form a metal nitrite (KNO₂).