Is it true that litmus is extracted from lichens?

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True

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answer is A.

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Detailed Solution

The above statement is true.
Litmus is extracted from lichens.
The compounds known as indicators change colour when they come into contact with acids and bases. The most popular indicator in laboratories is litmus. It is derived from lichens and offered as solutions or in the shape of litmus paper strips. It turns blue in the presence of acids and red in the presence of bases.

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