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Olfactory indicators
The term of ‘olfactory’ means ‘relating to the sense of smell’
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< Onion and vanilla >
{1}- an acidic sol^ is add on onion then they don’t destroy the smell of
onion and basic sol^ is add on onion then they destroy the smell of onions
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there are two types of acids {1}- organic acid, natural acid and weak acid
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For example - acetic acid (or ethnic acid), citric acid and lactic acid
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It is harmful to eat or drink
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Expectation carbonic acid
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{2}- a dilute acid is one which contains much more water in it
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- acids have h ions in free state to pass electricity