Question

which metal displace hydrogen form dil HNo3

Answer 1

nitric acid is an oxidizing agent, hydrogen (H) is rarely formed. Only magnesium(Mg) and calcium (Ca) react with cold, dilute nitric acid to give hydrogen:

Mg(s) + 2HNO3 (aq) → Mg(NO3)2 (aq) + H2 (g)

OR

Answer 2

Cu + 4HNO3 → Cu(NO3)2 + 2NO2 +H2O