Multiple choice

pH is a measure of

  1. proportion of protons

  2. proportion of neutrons

  3. proportion of electrons

  4. proportion of dipoles
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A Correct answer
Explanation

The pH scale is a logarithmic measure of the concentration of hydrogen ions (H+) in a solution. Since a hydrogen ion is simply a single proton, pH directly measures the proportion of protons. Neutrons, electrons, and dipoles do not determine the acidity or basicity of a solution.

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