A yellow curry stain on a white shirt turns red when it is washed with soap. Explain why?

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Solution

This happens because the soap solution is basic in nature which changes the colour of turmeric in the curry stain to red. Turmeric is a natural indicator.

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Similar questions

A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish - brown. On rinsing the shirt with plenty of water, the reddish - brown stain turns yellow again.

(a) Name the natural indicator present in curry stain.

(b) Explain the changes in colour of this indicator which take place during washing and rinsing the shirt.

Q. A cloth stained in ______ will turn red when washed with _______.

Q. On washing with soap, a turmeric stain on the cloth turns to red because
A. soap solution is alkaline.
B. soap solution is acidic.
C. turmeric contains a natural indicator.
D. turmeric contain litmus.
Select the correct alternative.

Q. If you get a turmeric (haldi) stain on your clothes while eating food, and try to wash it off with soap, the stain becomes red. Why? Find out how to remove haldi stains from clothes.

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