PH Value MCQ Questions and Answers
1. What is the pH value of a neutral solution?
a) 0
b) 7
c) 14
d) 10
2. Lemon juice typically has a pH of:
a) 0
b) 7
c) 2
d) 4
3. A solution with a pH of 9 is considered:
a) Neutral
b) Acidic
c) Basic
d) Alkaline
4. Vinegar has a pH value of approximately:
a) 0
b) 3
c) 7
d) 1
5. The pH of gastric acid in the human stomach is approximately:
a) 0
b) 3
c) 7
d) 4
6. A solution with a pH of 12 is considered:
a) Neutral
b) Acidic
c) Basic
d) Alkaline
7. What pH value indicates a strong acid?
a) pH 1
b) pH 7
c) pH 10
d) pH 14
8. Blood typically has a pH range between:
a) 1-2
b) 5-6
c) 7.35-7.45
d) 10-12
9. The pH scale measures the concentration of:
a) Hydrogen ions
b) Oxygen ions
c) Carbon ions
d) Nitrogen ions
10. What is the pH scale ranges from:
a) 0 to 7
b) 0 to 10
c) 0 to 14
d) -7 to 7
11. What pH value indicates a strong base?
a) pH 1
b) pH 7
c) pH 10
d) pH 14
12. If the pH of a solution changes from 3 to 5, what happens to its acidity?
a) It increases
b) It decreases
c) It remains the same
d) It cannot be determined
13. Which of the following substances is likely to have a pH closest to 7?
a) Distilled water
b) Orange juice
c) Battery acid
d) Drain cleaner
14. Which of the following substances is considered a strong acid?
a) Citric acid
b) Acetic acid
c) Hydrochloric acid
d) Carbonic acid
15. The pH of human saliva typically ranges between:
a) 1-2
b) 5-6
c) 7-8
d) 10-11
16. What is the pH value of tear ?
a) 7.0
b) 7.9
c) 7.2
d) 7.7
17. What is the pH value of skin ?
a) 7.2
b) 7.3
c) 7.6
d) 7.8
18. What is the pH value of blood ?
a) 7.0
b) 7.2
c) 7.4
d) 7.6
19. What is the pH value of urine??
a) -4.4 – 8
b) -4.4 – 6
c) -4.4 – 4
d) -4.4 – 2
20. What is the pH value of bile juice?
a) -6 – 8.6
b) -4 – 8.6
c) -8 – 8.6
d) -2 – 8.6