Name the source from which litmus solution is obtained. What is the use of this solution?
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 .
- If the medium is acidic , litmus changes its colour to red .
- If the medium is basic , litmus changes its colour to blue .
- If the medium is neutral , there is no change in the colour.