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# 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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