1.

(a) What is an indicator ? Name three common indicators.(b) Name the acid-base indicator extracted from lichen.(c) What colour does the turmeric paper turn when put in an alkaline solution ?

Answer»

(a) An indicator is a ‘dye’ that changes colour when it is put in an acid or a base. The three most common indicators are: Litmus, Methyl orange and Phenolphthalein.

(b) Litmus.

(c) Red.



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