Question 31

Hydroiodic acid is the correct name for aqueous HI.

Aqueous HI is commonly referred to as hydroiodic acid, which is the name used to describe this strong acid in its aqueous form.

A) hydroiodic acid

This option is correct because hydroiodic acid is the proper name for HI when it is dissolved in water. It reflects the acid's composition, indicating it is derived from hydrogen and iodine.

B) hydrogen iodide

While hydrogen iodide is the correct name for the gaseous form of HI, it is not the name used when HI is in aqueous solution. Therefore, this option is incorrect in the context of the question regarding the name of aqueous HI.

C) iodine hydrogen

This option is incorrect as it does not accurately describe the chemical composition or the nomenclature of HI. The term "iodine hydrogen" is not recognized in the naming conventions of acids or chemical compounds.

D) hydroiodine acid

This option is also incorrect. The term "hydroiodine acid" is not a standard nomenclature in chemistry. The correct term is hydroiodic acid, making this option an inaccurate representation of aqueous HI.

Conclusion

Hydroiodic acid is the definitive name for aqueous HI, distinguishing it from its gaseous counterpart, hydrogen iodide. All other options fail to correctly identify the substance in its aqueous form, either by using incorrect terminology or by referring to forms that do not encapsulate the nature of the compound as an acid in solution.