Answer:
Based on the given option, the unbalanced form is Option A
[tex]Al+HCl\operatorname{\rightarrow}AlCl_3+H_2[/tex]
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:
[tex]Al+HCl\rightarrow AlCl_3+H_2[/tex]
The balanced form of the reaction will be expressed as:
[tex]2Al+6HCl\rightarrow2AlCl_3+3H_2[/tex]
