Multiple choice

Which one of the following best represents pH?

  1. Phosphorus and hydrogen content in soil

  2. Percentage of Hydrogen in soil

  3. Proportion of potash and hydrogen in soil

  4. Concentration of hydrogen ions in the soil
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

pH measures the concentration of hydrogen ions (H+) in a solution, including soil. A lower pH indicates higher acidity (more H+ ions), while higher pH means more alkaline (fewer H+ ions). Options A, B, and C are incorrect because pH is not about phosphorus, percentage of hydrogen, or potash content.

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