Question

. . Why does a yellow stain of curry on white T shirt become red/reddish brown ,when it is scrubbed by a soap? *

1 point

a) due to reaction of acid present in the soap with T-Shirt

b) due to reaction between water and soap solution with white T-shirt

c) due to reaction of base of soap solution with yellow stain of white T-Shirt

d) no specific reason​

Answer 1

Answer:

Curry contains turmeric which acts as an acid-base indicator. Turmeric contains yellow dye, which turns red in basic solutions when soap is scrubbed on a stain of curry on a white cloth. This is due to the fact that soap solution is basic in nature which changes the colour of turmeric in the curry stain to red-brown.