MCQ practice · SSC Chemistry Board questions · Chapter 9: Acid-Base Balance
Which one has the lowest pH?
Think it through first, then pick an option.
- a Human skin
- b Pancreatic juice
- c Urine
- d Blood
Answer and explanation
Correct answer: a Human skin
Of these four, skin at pH 4.8-5.5 is the lowest.
Why the other options are wrong
- b Pancreatic juice: Pancreatic juice is pH 8.1, the highest, not the lowest.
- c Urine: Urine is pH 6, which is higher than skin at 4.8-5.5.
- d Blood: Blood is pH 7.43-7.45, close to neutral, so not the lowest.
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