What will be the product (s) of a single replacement reaction in which the reactants are Fe and 2 HCl?

A. H2Cl2Fe

B. FeCl2 + H2

C. FeH2 + Cl2

D. Fe + H2 + Cl2

Answer: Option B) FeCl2 + H2

Explanation:

Fe (s) + 2HCl (aq) → FeCl2 (s) + H2 (g)

The above is a single replacement reaction because Iron, Fe replaces hydrogen in its compound, HCl to form FeCl2 and liberate hydrogen gas.

Thus, the reaction shows that the more reactive iron, Fe reacts with the dilute hydrochloric acid, HCl to give products such as Iron (II) chloride, FeCl2 and hydrogen gas, H2.