MCQ
Q.
What is the range of pH scale?
Correct Answer: A
The correct answer is 0 to 14.
Important Points
- The pH scale is the scale used to express the acidity or alkalinity of a substance based on the concentration of hydrogen ions in its solution.
- pH scale was discovered by Soren Sorensen.
- The range of pH scale 0 to 14.
- If pH < 7 then solution is acidic.
- If pH > 7 then solution is basic.
- If pH = 7 then solution is neutral.
Additional Information
- pH means the potential of Hydrogen.
- The strength of acids and bases depends on the number of H+ ions and OH- ions produced, respectively.
- The human body works within the pH range of 7.0 to 7.8.
- When the pH of rainwater is less than 5.6, it is called acid rain.
- Tooth decay starts when the pH of the mouth is lower than 5.5.

