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Gas evolution reaction

## Summary

A gas evolution reaction is a chemical reaction in which one of the end products is a gas such as oxygen or carbon dioxide.[1][2] Gas evolution reactions may be carried out in a fume chamber when the gases produced are poisonous when inhaled or explosive.[3]

## Examples

${\displaystyle {\ce {Zn + dil. H_2SO_4 -> ZnSO_4 + H_2 ^}}}$
In this example, hydrogen gas in diatomic form is released. Dilute hydrocloric acid can also be used in place of dilute sulphuric acid.
${\displaystyle {\ce {2HCl + F_2 -> 2HF + Cl_2 ^}}}$