When metal Z is added to dilute HCl solution, there is no evolution of gas. Metal is

When metal Z is added to the dilute HCl solution, there is no evolution of gas. The metal here is Ag.
The metals like sodium, potassium and zinc are more reactive than the hydrogen gas in the reactivity series. Hence, these metals displace hydrogen gas when reacted with the dilute HCl solution. Silver is less reactive than hydrogen and does not evolve any hydrogen gas.