Several gasses can react with metals, but due to the fact that you are asking for a single gas, the most likely answer that you will be looking for is Oxygen. Oxygen reacts with many metals (and non-metals).
An acid, such as hydrochloric acid or sulfuric acid, produces hydrogen gas when it reacts with some metals like zinc or aluminum. The reaction releases hydrogen gas along with a salt as a byproduct.
When metals are put in hydrochloric acid, hydrogen gas is produced as the metal reacts with the acid to form metal chloride and hydrogen gas as a byproduct.
Alkali metals such as lithium, sodium, and potassium react with air by forming oxides or peroxides. These reactions can release heat and hydrogen gas, and may also cause fires or explosions. It's important to handle alkali metals carefully to prevent accidents.
Oxygen gas (O2) reacts with copper (Cu) to form copper oxide (CuO).
Several gasses can react with metals, but due to the fact that you are asking for a single gas, the most likely answer that you will be looking for is Oxygen. Oxygen reacts with many metals (and non-metals).
Many metals react with strong acids to produce hydrogen gas.
An acid, such as hydrochloric acid or sulfuric acid, produces hydrogen gas when it reacts with some metals like zinc or aluminum. The reaction releases hydrogen gas along with a salt as a byproduct.
Oxygen
Fluorine gas is one of the most reactive elements that exist and it will react with most metals.
oxygen
Carbon dioxide
When metals are put in hydrochloric acid, hydrogen gas is produced as the metal reacts with the acid to form metal chloride and hydrogen gas as a byproduct.
Alkali metals such as lithium, sodium, and potassium react with air by forming oxides or peroxides. These reactions can release heat and hydrogen gas, and may also cause fires or explosions. It's important to handle alkali metals carefully to prevent accidents.
Hydrogen gas is typically released in the reaction between metals and acids, such as when hydrochloric acid reacts with zinc to produce zinc chloride and hydrogen gas.
Oxygen gas (O2) reacts with copper (Cu) to form copper oxide (CuO).
Hydrochloric acid gives off hydrogen gas when it reacts with certain metals, such as magnesium or zinc. When hydrochloric acid reacts with limestone (calcium carbonate), carbon dioxide gas is produced.