Oxygen
Nitrogen, is the most reactive gas that can be found abundantly in the air...
Acids can react with metals to produce hydrogen gas, not oxygen. When acids react with metals, they displace hydrogen gas from the acid.
Metals react with acids to produce a salt and hydrogen gas.
Metals such as zinc, aluminum, and iron can react with acids but not with water. When these metals react with acids, they undergo a chemical reaction that produces hydrogen gas and a salt. In contrast, these metals do not react with water to produce hydrogen gas.
When acids react with active metals, they always produce a salt and hydrogen gas.
Alkaline earth metals are reactive and tend to lose two electrons to form a 2+ cation. They react with water to produce hydrogen gas and hydroxide ions. They also form oxides when they react with oxygen in the air.
Do you mean seperately?If yes, then:When they react with air, it is combustion: 2Ca + O2 --> 2CaOWith water, they simply come to be hydroxides: Na + H2O --> NaOH + H2When they react with acids then a salt and hydrogen gas is formed: Zn +2HCl --> ZnCl2 + H2
No, not all metals react with hydrochloric acid to produce hydrogen gas. Only metals higher in the reactivity series than hydrogen, such as zinc, iron, and magnesium, will react with hydrochloric acid to form hydrogen gas. Metals like gold, silver, and platinum do not react with hydrochloric acid.
Lithium, Sodium, Potassium, Rubidium, Cesium, and Francium are the main alkali metals, which all react fairly spectacularly with water (Cesium must be kept in argon gas to stop it reacting with air).
Acids can react with metals (such as zinc or magnesium) to produce hydrogen gas. The acid reacts with the metal to form a salt and hydrogen gas is released as a byproduct of the reaction.
Hydrogen
Hydrogen gas is released.