Nursing Entrance Exam (NEX) 2025 – 400 Free Practice Questions to Pass the Exam

The value of pH indicates the acidity or basicity of a solution on a scale from 0 to 14. A pH of 7 is considered neutral, which is typically the pH of pure water. Lower values on the pH scale represent acidic solutions, while higher values indicate basic (or alkaline) solutions.

In the case of the provided pH values, 2 and 4 are considered acidic, with 2 being a stronger acid than 4. A pH of 12 indicates a basic solution, but it is not the most basic option. A pH of 14 represents the highest level of basicity on the scale, making it the most basic solution among the choices listed.

Thus, a pH of 14 corresponds to a very alkaline solution, such as a strong base, which completes the understanding that 14 is indeed the most basic pH value in the provided options.