Blue litmus turns red in a solution. The solution is likely:

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Acids turn blue litmus red; bases turn red litmus blue. Litmus is a purple dye extracted from lichens, used as an indicator. pH < 4.5 red, > 8.3 blue, intermediate purple. Neutral solution (pH 7) does not change the color of litmus significantly. This is a simple test for acid-base nature.

Blue litmus turns red in a solution. The solution is likely: MCQ with Answer and Explanation

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