AFOQT Practice Test 2026 – Complete Exam Prep

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What characteristic indicates the pH level of an acid?

A pH between 7 and 14

A pH of 7

A pH between 0 and 7

The characteristic that indicates the pH level of an acid is a pH between 0 and 7. Acids are substances that release hydrogen ions (H⁺) in solution, causing the pH to drop below 7, which is the neutral level for pH. The scale ranges from 0 to 14, where values lower than 7 signify acidity, and values higher than 7 signify alkalinity.

A pH between 7 and 14 denotes basic or alkaline substances rather than acids. A pH of exactly 7 represents a neutral solution, typically seen in pure water. While it is possible in some extreme cases for a substance to have a pH below 0 (such as concentrated strong acids), this is not the general characteristic for acids as a whole. Therefore, when looking for the typical range that signifies an acidic environment, the correct identification is between 0 and 7.

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A pH below 0

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