Question

Give reasons for the following. Give the chemical equation wherever required.

A glowing splint reignites in the presence of the gas evolved on heating of lead nitrate.

Answer 1

Thermal decomposition of lead nitrate releases oxygen gas (O₂), which is a strong supporter of combustion and causes a glowing splint to burst into flame.

\[\ce{2Pb(NO3)2 (s) ->[\Delta] 2PbO (s) + 4NO2 (g) + O2 (g)}\]