What is universal indicator and olfactory Indicator give example
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universal indicator is used to to detect the ph while olfactory indicator is used to know is the substance acidic or basic olfactory indicator's examples are onion vanila etc this is mainly used by disabled people
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A mixture of several indicators which shows different colours at different concentrations of hydrogen ions in a solution is an universal indicator.
The substance which indicates the presence of an acid or base by changing its odour in a solution is an olfactory indicator. Example-onion juice, clove oil.
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