Solid Lead II carbonate can not conduct electricity because it is insoluble in water.
First of all, we must establish the fact that ionic solids conduct electricity in solution because they can be broken up into ions in solution.
In the solid state, they do not conduct electricity because the ions are strongly bound by electrostatic forces.
However, if an ionic substance is insoluble in water, its ions are not available to conduct electricity since ions are the charge carrier in solution. As a result of this, such a substance will not conduct electricity.
Since Lead II carbonate is insoluble in water, its ions are not available hence the substance does not conduct electricity.
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