Solution:Concept- We are aware that balanced chemical equations are those in which all of the species involved have an equal amount of atoms on both the reactant and product sides.
A balanced chemical equation contains an equal number of atoms on either side.
Using the hit and trial method of balancing chemical reaction, the required balanced chemical reaction is:
Therefore, to balance the aforementioned reaction, we must balance the moles of each individual element that is present on both the reactant and product sides. One of the well-known approaches, the hit-and-miss method, can typically balance this reaction.
We therefore have two aluminium atoms, four oxygen atoms, one sodium atom, and one hydrogen atom in the reactant side's reaction. On the product side, we have two hydrogen atoms, one sodium atom, three oxygen atoms, and one aluminium atom.
The hit-and-miss approach allows us to conclude that there must be one mole of aluminium oxide that reacts with two moles of sodium hydroxide to produce one mole of sodium aluminate and two moles of sodium aluminate.
Hence, the correct answer is option (4).