Which of the following is an acid-base indicator?

Vinegar

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Limewater

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Turmeric

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Baking Soda

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Solution

The correct option is C Turmeric
An indicator is a substance which indicates if a substance is acidic or basic. Turmeric is a natural acid-base indicator which is yellow in colour. It remains yellow in an acidic solution and turns to reddish brown in a basic solution.

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Which of the following cannot be used as an acid-base indicator?

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