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Acids, Bases and Salts — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceAcids, Bases and Salts3 Marks
Question
Name the source from which litmus solution is obtained. What is the use of this solution?
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Answer

Litmus solution is obtained from lichens. A natural dye extracted from lichens is dissolved in distilled water to obtain litmus solution.

It is used as an indicator to distinguish between acids and bases.

Solution Colour of litmus solution
Acidic Red
Basic Blue
Neutral No change

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