Write two observations for the following chemical reaction:
$(a)$ Lead nitrate is strongly heated in a hard glass test tube.
$(a)$ Lead nitrate is strongly heated in a hard glass test tube.
(N/A) The chemical equation for the thermal decomposition of lead nitrate is:
$2Pb(NO_{3})_{2}(s) \xrightarrow{\Delta} 2PbO(s) + 4NO_{2}(g) + O_{2}(g)$
Observations:
$(i)$ Evolution of reddish-brown fumes of nitrogen dioxide $(NO_{2})$ gas.
$(ii)$ Formation of a yellow-colored residue of lead$(II)$ oxide $(PbO)$ in the test tube.
$2Pb(NO_{3})_{2}(s) \xrightarrow{\Delta} 2PbO(s) + 4NO_{2}(g) + O_{2}(g)$
Observations:
$(i)$ Evolution of reddish-brown fumes of nitrogen dioxide $(NO_{2})$ gas.
$(ii)$ Formation of a yellow-colored residue of lead$(II)$ oxide $(PbO)$ in the test tube.
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