American Chemical Society (ACS) Chemistry Practice Exam 2025 - Free ACS Chemistry Practice Questions and Study Guide

Question: 1 / 400

Which acid is known as nitric acid?

HClO3

HNO3

Nitric acid is indeed represented by the chemical formula HNO3. It is a strong acid known for its vigorous reactivity, especially with metals, and it plays a crucial role in various chemical processes, including the production of fertilizers, explosives, and in certain industrial applications. The structure of nitric acid features a nitrogen atom bonded to three oxygen atoms, where one of those bonds is a double bond, and it possesses a hydrogen atom that contributes to its acidic properties.

Other acids listed in the options include different compositions. HClO3 refers to chloric acid, H2SO4 denotes sulfuric acid, and HBr stands for hydrobromic acid. Each of these acids has distinct characteristics, reactivity, and uses, which do not align with the definition or properties of nitric acid. Therefore, identifying HNO3 as nitric acid correctly captures its identity and significance in chemistry.

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H2SO4

HBr

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