Question

The pH value of pure water remains:

• A. 1
• B. 7
• C. 0
• D. 14

Hint:

A pH of 7 is neutral, with equal concentrations of \( \text{H}^+ \) and \( \text{OH}^- \) ions in the solution.

Answer 1

The Correct Option is B

The pH value of pure water at 25°C is 7. This is considered neutral because, in pure water, the concentration of hydrogen ions (\( \text{H}^+ \)) is equal to the concentration of hydroxide ions (\( \text{OH}^- \)).
- Option (A) is incorrect because the pH of pure water is not 1, which is highly acidic.
- Option (C) is incorrect because the pH of pure water is not 0.
- Option (D) is incorrect because a pH of 14 represents a highly basic solution, not pure water.
Thus, the correct pH value for pure water is 7.