Question- How will you define the term indicator.. On chapter Acid,Bases and Salts
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Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
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An indicator is a dye that changes colour when it is put into an acid or a base. An indicator tells us whether a given substance is an acid or a base by change in its colour. 1)Orange juice turns blue litmus to red,so orange juice is acidic in nature.
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