Lead carbonate does not react with dil. HCl

That's not entirely correct. Lead carbonate actually does react with dilute hydrochloric acid. The reaction is as follows:

PbCO3 + 2HCl → PbCl2 + H2O + CO2

Here's the step-by-step process:

1. Lead carbonate (PbCO3) reacts with hydrochloric acid (HCl). This is an acid-base reaction, where the carbonate (CO3) acts as a base and reacts with the acid (HCl).

2. The reaction produces lead chloride (PbCl2), water (H2O), and carbon dioxide (CO2).

3. The carbon dioxide gas is released into the atmosphere, and you're left with a solution of lead chloride and water.

So, lead carbonate does indeed react with dilute hydrochloric acid.