Turmeric is an olfactory indicator or not.

Olfactory Indicators: Substances which change their smell when mixed with acid or base are known as olfactory indicators.

For example onion, vanilla, clove, etc. Onion: Paste or juice of onion loses its smell when added with base. It does not change its smell with acid.

Turmeric is a common spice in curry. It is a natural indicator and is used to check acidity and basicity. Turmeric is yellow in acid and neutral substances but turns bright red with bases.

Hence, Turmeric is not an Olfactory Indicator but a Natural Indicator.


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