Question

Name the gas evolved when $\mathrm{HCl}$ acid is added to Zinc metal.

Answer 1

The gas evolved during the reaction of $\mathrm{HCl}$ acid and Zinc:

• Zinc is known as a metal having electropositive nature, which is useful for the reduction of chemical compounds.
• When $\mathrm{HCl}$ , which is an acid goes into the chemical reaction with the Zinc metal, the reaction occurs by vigorously bubbles, which are due to the formation of Hydrogen gas.
• The formation of bubbled Hydrogen gas generally indicates the reaction occurring between $\mathrm{HCl}$ and Zinc metal.
• The chemical reaction for this can be shown as:
  $\underset{\left(\mathrm{Zinc}\right)}{\mathrm{Zn}\left(\mathrm{s}\right)}+\underset{\left(\mathrm{Hydrochloric}\mathrm{acid}\right)}{2\mathrm{HCl}\left(\mathrm{aq}\right)}\to \underset{\left(\mathrm{Zinc}\mathrm{chloride}\right)}{{\mathrm{ZnCl}}_2\left(\mathrm{aq}\right)}+\underset{\left(\mathrm{Hydrogen}\mathrm{gas}\right)}{{\mathrm{H}}_2\left(\mathrm{g}\right)}$

Hence, the gas evolved when $\mathrm{HCl}$ acid is added to Zinc metal is Hydrogen gas.