Lead nitrate on heating gives

When lead(II) nitrate, Pb(NO3)2, is subjected to thermal decomposition, it breaks down into three distinct products: lead(II) oxide (PbO), nitrogen dioxide (NO2), and oxygen (O2) [1]. The balanced chemical equation for this reaction is 2Pb(NO3)2 → 2PbO + 4NO2 + O2 [1]. During the heating process, the solid lead nitrate powder decomposes, leaving behind a solid residue of lead monoxide (PbO) while liberating reddish-brown fumes of nitrogen dioxide gas and colorless oxygen gas. Lead(II) oxide is typically yellow or orange when hot and cools to a yellow solid. This reaction is a classic example of a thermal decomposition reaction where a single reactant breaks down into multiple simpler products upon the application of heat [1]. Therefore, the primary chemical products formed are PbO and NO2, matching the second option.

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 1: Chemical Reactions and Equations > Activity 1.6 > p. 9