WBCS.LIVE practice question

What is the pH of pure water at 25°C?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 5
  2. 7
  3. 9
  4. 1

Correct answer and explanation

Correct answer: 7

Explanation: ✅ Correct Answer: (B) 7 📚 Explanation: The pH scale measures how acidic or basic a substance is, ranging from 0 to 14. A pH of 7 is considered neutral. Pure water at 25°C has a pH of exactly 7 because the concentration of hydrogen ions equals the concentration of hydroxide ions. Values below 7 indicate acidity, while values above 7 indicate alkalinity (basicity).