What is the defination of blue litmus
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a blue coloring matter obtained from certain lichens, especiallyRoccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator
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Answer: A blue coloring matter obtained from certain lichens, especially Roccella Tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator.
Explanation: Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidic or basic.
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