Question

Why the turmeric stain on a cloth becomes reddish while washing soap
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Answer 1

Answer:

Turmeric contains acid and washing soap is basic, when we use soap for stain it becomes NEUTRAL (as base reacts with acid), therefore it becomes reddish (acid converts blue litmus to red)

Explanation:

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Answer 2

Answer:

because soap is a base

and turmeric is a indicator to which turns red in basic medium