Question

A visually challenged student, has to perform a lab test to detect the
presence of acid in a given solution. The acid-base indicator preferred by
him will be :
(a) Blue litmus
(b) Clove oil
(c) Red cabbage extract
(d) Hibiscus extract​

Answer 1

(b) Clove oil

as it is an olfactory indicator.

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@zaqwertyuioplm :)