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What colour does the turmeric paper turn when put in an alkaline solution?

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Question

What colour does the turmeric paper turn when put in an alkaline solution?

Short Answer
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Solution

Turmeric paper turns red (or reddish-brown) when exposed to an alkaline (basic) solution. This colour shift is due to curcumin, a natural pH indicator in turmeric that reacts chemically with hydroxide ions (OH).

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Chapter 2: Acids, Bases and Salts - Exercise 1 [Page 87]

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Lakhmir Singh Chemistry [English] Class 10
Chapter 2 Acids, Bases and Salts
Exercise 1 | Q 16. (c) | Page 87
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