Which of the following is acid-base indicator?

Ginger

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Turmeric

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Clove

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None of these

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Solution

The correct option is C Turmeric
Turmeric is a naturally occurring yellow colour compound. It is an acid-base indicator, turmeric compound remains yellow when acid or neutral solutions are added to it. When basic solutions such as sodium hydroxide are added to it, the solution turns pinkish-red.

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