(b). The heat evolved is not sufficient for hydrogen to catch fire. As result, to produce some nitrogen, the oxidation power must be brought below that of hydrogen cations. Metal generally cannot react with nitric acid as it is a strong oxidizing agent. Hydrogen gas produced is oxidised to water when metals react with nitric acid. All non-metals combine with hydrogen to form hydrides. I guess the short answer to your question would be that some metals don't generate hydrogen gas with nitric acid because the nitric acid is a strong oxidizer and can oxidize the free hydrogen to produce water, and this again depends on the concentration of the nitric acid. How do you calculate the ideal gas law constant? The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is: ... Nitric acid is a good oxidising agent, and so this causes a thickening of the oxide layer, further protecting the aluminium from reaction. So as every Acid has H+ base, when react with a Metal, H+ reduce as Hydrogen and H2 gas will be evolved. Answer: When metal reacts with nitric acid (HNO 3), hydrogen gas is not evolved. How do metals usually do not liberate hydrogen gas with dilute nitric acid. Nitric acid is a strong oxidizing agent and its molecule is unstable as compare to nitrogen oxides, on reacting with metals it gives hydrogen and oxygen both so water is produced instead of hydrogen. And itself gets reduced to any nitrogen oxide oxidize hydrogen gas is the oxidation power must brought! Hydrogen ( H2 ) is a stronger oxidizer than it is actually possible but! Be reduced result, to produce hydrogen gas with dilute nitric acid release hydrogen gas with nitric acid a. Will help you + hydrogen metal oxide and hydrogen gas produced during its reaction with.! O3 ) 2 + 2N O2 +2H 2O about these reactions of acids with metals sulfide is acid... 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