what is key word of synthetic indicators and olfactory indicators
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Phenophthalein indicator - it is colourless. those substance whose is made changes in acidic or basic solution are called olfactory indicator. For example Vanilla extract has a characteristic pleasant smell.
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Phenophthalein indicator - it is colourless. those substance whose is made changes in acidic or basic solution are called olfactory indicator. For example Vanilla extract has a characteristic pleasant smell.
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