Question

why HNO3 do not give hydrogen gas after reaction with metals..? ​

Answer 1

Answer:

because hno3 is strong oxidizing agent. when h2 is released then the hno3 solution oxidises h2 to form h20 .

Answer 2

Answer:

Explanation:because Hno3 is a strong oxidising agent. It oxides H2 to produce H2O and itself get reduced to N2O or NO2.

But metals that react with HNO 3 to give h2 are (Mn and Mg)