issb general knowledge MCQ #135

What is the approximate pH value of pure water at 25 degrees Celsius?

issb general knowledge MCQ #135

  1. Question 1

    Q1. What is the approximate pH value of pure water at 25 degrees Celsius?

    • A) 0
    • B) 5
    • C) 7
    • D) 14

    Answer: 7

    Explanation: Pure water is neutral, so its pH is close to 7. Values below 7 indicate acidity and values above 7 indicate alkalinity.