Most of transition metals can displace hydrogen from dilute acids. Why?

Most of transition , metals can display hydrogen from dilute acid. Why?

Most of the transition metals do not displace hydrogen from dilute acids. Why?

(a). K_2PtCl_2 is a well known compound whereas corresponding is not known. State a reason for it. (b). Most of the transition metals do not displace hydrogen from dilute acids. Why? (c). Why have the transition elements high enthalpy of hydration? (d). Chromium is a typical hard metal while mercury is a liquid. Explain why.?

Most of the transition metals do not displace hydrogen from dilute acids, why ?

Which of the following metals can displace hydro-gen from dilute acids?

Name two metals which will displace hydrogen from dilute acids.

Name two metals which can displace hydrogen from acids.

Why is it that non-metals do not displace hydrogen from dilute acids?

Why is it that non-metals do not displace hydrogen from dilute acids?