what are indicators??give example
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Indicators are chemical compounds that tell us whether a substance is acidic or basic by changing its colour. When added to an acidic solution or a basic solution, indicators change their colour and this change in colour is different for the acids and bases. The indicator thus help us to decide whether a given solution is acidic or basic in nature.
The indicators that are obtained from plants are known as natural indicators.
Examples – Turmeric, china rosa, red cabbage and grape juice.
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The substances which change their color or odour when placed in acidic or basic medium accordingly.
Example - Litmus is a natural indicator , Lichens, Red cabbage, Clove is an olfactory indicator.
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