Question

$Pb_3 O_4 + 4HNO_3 \rightarrow 2Pb(NO_3)_2 + PbO_2 + 2H_2O $ Which is true about the lead ions in $Pb_3O_4$ ?

• A. $Pb^{2+}$ reacts with $HNO_3$ to give lead nitrate.
• B. $Pb^{4+}$ reacts with $HNO_3$ to give lead nitrate.
• C. $Pb^{2+}$ reacts with $HNO_3$ to give $PbO_2$
• D. $Pb^{4+}$ reacts with $HNO_3$ to give $PbO_2$

Answer 1

Answer: (A)

$Pb _3 O _4$ is a mixture of $PbO _2+ PbO$ and only $PbO$ i.e., $Pb ^2+$ reacts with $HNO _3$ to form $Pb \left( NO _3\right)_2$.