Heating of zinc nitrate is a ............... reaction.
Decomposition reaction
Reason — Zinc nitrate undergoes thermal decomposition and produces reddish brown Nitrogen dioxide gas (NO2), Zinc oxide (ZnO), and Oxygen gas (O2).
Zn(NO3)2→Δ4NO2+2ZnO+O2↑\text{Zn}(\text{NO}_3)_2 \xrightarrow{\Delta} \text{4NO}_2 + \text{2ZnO} + \text{O}_2 ↑Zn(NO3)2Δ4NO2+2ZnO+O2↑