Final answer:
The reaction that does not involve neutralization is B H2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2HCl(aq), which is a precipitation reaction, not neutralization.
Step-by-step explanation:
Among the given options, the reaction B H2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2HCl(aq) does not involve neutralization. Instead, this is a precipitation reaction where barium sulfate (BaSO4) forms as an insoluble solid or precipitate. Neutralization reactions typically involve an acid and a base reacting to form water and a salt. Option A involves ammonia, a weak base, reacting with sulfuric acid, resulting in ammonium sulfate, which is a type of neutralization, albeit with a gas as one of the reactants. Option C is an acid-base reaction between a metal oxide base and sulfuric acid, resulting in water and a salt, which does indeed qualify as neutralization. Lastly, option D is a classic example of neutralization, with a strong acid (H2SO4) reacting with a strong base (NaOH) to produce a salt (Na2SO4) and water.