When ferrous hydroxide reacts with hydrochloric acid, ____ and ${\mathrm{H}}_2\mathrm{O}$ are produced.

The correct option is B

${\mathrm{FeCl}}_2$

Explanation:

• Acid and base react together to form salt and Water $\left({\mathrm{H}}_2\mathrm{O}\right)$. And the reaction is named as neutralization reaction.
• Ferrous hydroxide or Iron(II) hydroxide $\left(\mathrm{Fe}{\left(\mathrm{OH}\right)}_2\right)$ is a base while hydrochloric acid or hydrogen chloride $\left(\mathrm{HCl}\right)$ is an acid.
• Ferrous hydroxide undergoes reaction with hydrochloric acid to form Iron (II) chloride (${\mathrm{FeCl}}_2$) along with Water molecule.

$\mathrm{Fe}{\left(\mathrm{OH}\right)}_2\left(\mathrm{s}\right)+2\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{FeCl}}_2\left(\mathrm{aq}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

• Thus, when ferrous hydroxide reacts with hydrochloric acid, iron (II) chloride $\left({\mathrm{FeCl}}_2\right)$ and ${\mathrm{H}}_2\mathrm{O}$ are produced.

Final Answer: .

Hence, the correct option is B.