A metal X with dull appearance do not react with water. But it reacts slowly with dilHCl to form its respective salt Z. Find X and Z.
X and Z are Pb and PbCl2 respectively
The metal X is lead. The surface of metallic lead is protected by a thin layer of lead oxide, PbO. This gives it a dull appearance. It does not react with water under normal conditions. But it reacts with dilute HCl to form lead chloride.
Pb+2HCI˙aPbCI2+H2