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Question 6

Litmus, a natural dye is an extract of which of the following?
(a) China rose (Gudhal)
(b) Beetroot
(c) Lichen
(d) Blueberries (Jamun)


Solution

Lichen gives the natural purple dye, litmus, which is used as an acid-base indicator. Litmus turns red when added to an acidic solution and blue when added to a basic solution.

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