Question

25) Why does the stain of curry on a white cloth become
reddish brown when soap is rubbed on it ? (Chp.2)​

Answer 1

Answer:

The stain of the curry turns reddish brown as it contains turmeric (which is a natural indicator). If soap (which is a base) is rubbed on it, it turns reddish brown to indicate that the soap is a base.

Hope this helps...

Answer 2

the stain of curry on a white cloth become reddish brown when soap is rubbed on it because the turmeric is an indicator and soap is basic in nature