MCQ on pH Scale and its Applications




The pH scale is a measure of the acidity or alkalinity of a substance, ranging from 0 (highly acidic) to 14 (highly alkaline), with 7 being neutral. It quantifies the concentration of hydrogen ions in a solution, where lower values indicate higher acidity and higher values indicate greater alkalinity. This is an MCQ on pH Scale and its applications in biology.

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1. 
What does the "pH" in pH scale stand for?

2. 
Which pH value represents a neutral solution on the pH scale?

3. 
What is the pH value of a solution with a hydrogen ion (H+) concentration of 1 x 10^-8 M?

4. 
Which of the following substances would be classified as a strong acid on the pH scale?

5. 
A solution with a pH of 10 is how many times more alkaline (basic) than a solution with a pH of 8?

6. 
What is the pH of pure water at 25°C?

7. 
If the pH of a solution changes from 5 to 3, how does the hydrogen ion (H+) concentration change?

8. 
Which of the following statements about the pH scale is true?

9. 
What happens to the pH of a solution when an acid is added to it?

10. 
Which of the following substances is considered a strong base on the pH scale?

11. 
What is the pH range for acidic solutions on the pH scale?

12. 
Which of the following substances is NOT typically used as a buffer solution to control pH?

13. 
What does a pH of 14 indicate on the pH scale?

14. 
What is the relationship between pH and the concentration of hydrogen ions (H+) in a solution?

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