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What colour does turmeric become in contact with a basic substance?

Answer and explanation

Correct answer: Reddish-brown

Turmeric contains a natural pigment that acts as an acid-base indicator. In its usual form it is yellow, but when it contacts a basic substance, the pigment changes to a reddish-brown colour. This change is useful for recognizing alkaline materials. The yellow colour is the original turmeric colour, while green and blue are not the characteristic basic reaction of turmeric. Hence, option B is correct.

Related tags

TurmericNatural IndicatorBaseAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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