According to the Arrhenius theory, a base reacts with an acid to produce ...

According to the Arrhenius an acid and base react they form water and salt.

Explanation:

Neutralization reaction:

When an acid and base react they form water and salt. The reaction is called neutralization reaction.

According to the Arrhenius an acid is the substance which increase the H⁺ concentration, while base is the substance which increase the OH⁻ concentration.

General equation:

HX + BOH → BX + H₂O

From given reaction equations only option C is correct because only this reaction gives salt and water.

For example,

Chemical equation:

Ca (OH) ₂ + H₂SO₄ → CaSO₄ + 2H₂O

Calcium hydroxide is acting as a base. Sulfuric acid is an acid. Both these reactants react to form salt which is calcium sulfate and water.

Calcium hydroxide dissociate to gives Ca²⁺ ion and OH⁻ while H₂SO₄ dissociate to gives H⁺ and SO₄²⁻. Ca²⁺ and SO₄²⁻ react to form salt CaSO₄ while OH⁻ and H⁺ form water.