Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.

Answer:

The above solution may be neutral or basic in nature as both of them will not change the colour of the blue litmus paper.

  • The litmus paper gives a general indication of acidity or alkalinity.
  • Under the acidic conditions, the blue paper turns red where the pH level is below 4.5.
  • In contrast, the red paper does not change its colour under alkaline conditions where the pH level is above 8.3.
  • Blue litmus doesn’t change its colour under alkaline conditions, while the red one doesn’t change its colour under acidic conditions.

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