Q. Which one of the following is commonly used as an indicator to measure the exact pH?
A) Phenolphthalein
B) Eosin
C) Litmus
D) Universal indicator
✔ Correct Answer: Universal indicator
Exam Insight
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A) Phenolphthalein
B) Eosin
C) Litmus
D) Universal indicator
✔ Correct Answer: Universal indicator
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