Question

what is litmus..........?​

Answer 1

$\underline{\huge{Answer:-}}$

Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often adsorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity.

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Answer 2

Answer:

a dye obtained from certain lichens that is red under acid conditions and blue under alkaline conditions.