A solution has turned the colour of red litmus paper to blue. The pH of the solution is approximately:

A solution has turned the colour of red litmus paper to blue. The pH of the solution is approximately:

Q. A solution has turned the colour of red litmus paper to blue. The pH of the solution is approximately:

  1. 2
  2. 5
  3. 7
  4. 10

Answer: 10

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