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Is bitter taste physical or chemical?

Answer 1

#"Bitterness"# is probably a chemical property......

See this old answer and links. And thus bitterness probably relates to the #pH#, with #pH>7# giving a soapy, bitter flavour. Note that we commonly drink #"bitter beer"#, in Old Blighty it is common to order to pint of bitter in a pub. Beer, like wine, and cheese, and lemon juice, and most things that taste good, is slightly acidic.....

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Answer 2

Cameron Andrews

Bitter taste is regarded as a physical attribute and is experienced through the senses.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.