What is the name of the ternary acid formed with chlorine that has the fewest oxygen atoms

Given Options:

A.  Hypochlorous acid

B.  Hypochlorine acid

C.  Hypochloric acid

D.  Chloric acid

A. Hypochlorous acid

Explanation:

On Edmentum, the following information about ternary acids is provided:

Ternary acids

Ternary acids contain three elements. Here, we will discuss those that contain hydrogen, oxygen, and a third element. These ternary acids are named according to the number of oxygen atoms in each molecule. The most common form is given the -ic suffix, but no prefix is used. So the ternary acid of hydrogen, oxygen, and sulfur is sulfuric acid (H2SO4).

A second acid with the same elements

Sometimes a second acid is formed that contains the same three elements, but fewer oxygen atoms. Still no prefix is used, but the suffix changes from -ic to -ous. So H2SO3 is sulfurous acid.

A third acid with the same elements  

If a third acid is formed with the same three elements but even fewer oxygen atoms, the prefix hypo- is added along with the suffix -ous. H2SO2 is called hyposulfurous acid.

Conclusion:

According to the given information, a third ternary acid formed with chlorine with the fewest oxygen atoms would have the prefix hypo- and the suffix ous-. Therefore, it would be called hypochlorous acid, which is option A.

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