Question

Why dose a turmeric stain on white shirt turn to red when it is washed with soap​

Answer 1

turmeric is an indicator which changes its yellow colour into reddish brown when come in contact with solution of base.

Answer 2

Answer:

Soap is basic in nature. Bases turn turmeric red. Hence, when soap (which is basic in nature) is scrubbed on the stain, the stain turns red.

Hope it helps..