Question

kamal white shirt was stained with lentils. when he started washing with soap, the stain turned red becqause the soap is ..............​

Answer 1

ANSWER

The natural indicator present in curry stain is turmeric.The yellow stain of curry turns reddish-brown when soap is scrubbed on it because of the fact that soap solution is basic in nature which changes the colour of turmeric in the curry stain to reddish-brown. This stain turns yellow again when the cloth is rinsed with water because then the basic soap gets removed with water.

Answer 2

Answer:

Hi friend, we know that turmeric is an indicator which changes its yellow colour into reddish brown when come in contact with solution of base.We know that soap solution is base and thus , when turmeric stain is washed with soap a base turns reddish brown.