Question

2 3. A turmeric stain on a white shirt turns red when rubbed with soap water. Explain. 4. Why should we treat factory wastes before discharging them in the water bodies?
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Answer 1

Answer:

Turmeric is a natural acid-base indicator. It turns red in a basic solution and pale yellow in an acidic solution. Therefore, the turmeric stain will turn red after coming in contact with the soap, indicating the basic nature of the soap (generally soaps are bases – containing sodium hydroxide).

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