(a) What is litmus? How is litmus paper obtained?
(b) Write the method of preparation of turmeric paper.
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a) Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often adsorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity.
b) You can make a turmeric paper by applying turmeric paste on a paper and then drying it. You can prepare turmeric paste by adding just a little water in the turmeric powder.
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Explanation:
Water soluble mixture of dyes used to test the nature of substance
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