Question

which metals react with dilute acid and liberate H2 gas and which metals do no release H2 gas with dilute acid?​

Answer 1

lets solve for it,

Explanation:

Metals react with dilute acids and release H2 gas(hydrogen gas) but not in all cases. Metals that are very active or moderately active will liberate H2 gas when reacted with dilute acids. These are the metals that are placed on the top or in between the reactivity series. the metals like Fe, Al, K, Na are very reactive metals and will liberate H2 gas.

Reaction is as follows:

Fe + H₂SO₄ --> FeSO₄ + H₂

whereas metals like Copper, Silver , Gold and Platinum are least reactive metals and are placed at the bottom of the reactivity series will not react with acid to form H2 gas.

Answer 2

Answer:

Hydrogen gas is not evolved when a metal reacts with nitric acid. It is because HNO3 is a strong oxidising agent. It oxidises the H2 produced to water and itself gets reduced to any of the nitrogen oxides (N2O, NO, NO2).