Answer:
Based on the given option, the unbalanced form is Option A
![Al+HCl\operatorname{\rightarrow}AlCl_3+H_2]()
Explanations:
Equation is known to be balanced when the number of moles of element at the reactant is equal to that of product.
Aluminum = Al
Hydrochloric acid = HCl
The reaction formed by Aluminum and hydrochloric acid is expressed as:
![Al+HCl\rightarrow AlCl_3+H_2](https://img.qammunity.org/2023/formulas/chemistry/college/yb9ighcjb9y3ocoox8s2qergc4r59fhfmm.png)
The balanced form of the reaction will be expressed as:
![2Al+6HCl\rightarrow2AlCl_3+3H_2](https://img.qammunity.org/2023/formulas/chemistry/college/q7wu46qbfuak3j97z4wm25cml2nckp9ayi.png)