Question

What is the colour change when a stain of curry on a white cloth comes in contact with soap and why

Answer 1

Because stain of curry is acidic and on reacting with base i.e. soap it becomes neutral and the colour of stain is changed from yellow to reddish brown

Hope it helps you ..

Answer 2

Answer:

It contains turmeric. Turmeric is an indicator which gives red colour with a base since soap is a base so we get red colour