Question

name the two metals which can only reacts with HNO3 and can release H2 gas

Answer 1

Magnesium reacts with dilute nitric acid forms magnesium nitrate and hydrogen gas. 
Mg +2HNO3 → Mg(NO3)2 +H2 When zinc reacts with nitric acid produce zinc nitrate and hydrogen gas
Zn + 2HNO3 → Zn(NO3) +H2 


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Answer 2

Any metal above Hydrogen in reactivity series will react with Nitric Acid to give H2 or Hydrogen gas

like ca , zn