Question

I need a proper explanation and reaction of "Why do metals not give Hydrogen gas on reacting with Nitric Acid" ?​

Answer 1

Answer:

Nitric acid(HNO3) is a strong oxidising agent. The Hydrogen gas produced during its reaction with metal gets oxidised to H2O, hence no hydrogen gas is produced. Instead it evolves nitric oxides such as NO2,NO etc

Reactions with metals

Nitric acid reacts with most metals, but the details depend on the concentration of the acid and the nature of the metal. Dilute nitric acid behaves as a typical acid in its reaction with most metals. Magnesium, manganese, and zinc liberate H2: Mg + 2 HNO3 → Mg(NO3)2 + H2 (Magnesium nitrate)

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Answer 2

Answer:

because nitric acid is a strong oxidising agent it oxidises H2 which is released during reaction to h2o and reduces itself to nitrogen oxides.

but with Mn and mg it gives out hydrogen.