A solution turns red litmus blue. Which of the following is most likely to be the pH of the solution?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → pH = 10
A solution that turns red litmus blue is basic, and a basic solution has a pH above 7. Of the given values only 10 is above 7; pH 1, 4 and 5 are acidic.