Question

A Stain of curry on a white cloth ;ecomes reddish-brown when soap,which is base is scrubbed on it and then its turns yellow.Why?

Answer 1

because u will use tarmaric in the curry it is a natural indicater so after application of soap it will change to red

Answer 2

The stain of curry on a white cloth turns reddish brown when soap is rubbed on it because curry contains turmeric which is a indicator and soap is basic in nature. So, soap is reacting on curry (turmeric) which turns reddish brown in colour.

When the white cloth is washed in water then it turns yellow because water is neutral and the curry contains turmeric which is a indicator. The water turns turmeric back to yellow.

Hope it helps...

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