A. Identify the type of the following reaction:
Pb(NO3)2 (s) +Heat→PbO (s)+ 4NO2(g)+O2 (g).
B. We will observe the emission of brown fumes in the experiment.
A. In the given reaction a single reactant lead nitrate, Pb(NO3)2 on heating is breaking down into different products like lead oxide PbO, nitrogen dioxide NO2, and oxygen gas O2. This is an example of a decomposition reaction. The reaction is endothermic in nature since it involves the absorption of heat. In other words, the given reaction is a thermal decomposition reaction.
B. These fumes are of nitrogen dioxide (NO2) thus formed in the given reaction.