Question

A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish-brown. On rinsing the shirt with plenty of water, the reddish-brown stain turns yellow again.
(a) Name the natural indicator present in curry stain.
(b) Explain the changes in colour of this indicator which take place during washing and rinsing the shirt.
(c) What is the nature of soap (acidic/basic) as shown by the indicator present in curry stain ?

Lakhmir Singh Chemistry Class 10

Answer 1

Hey friend ☺

Here's ur answer!

a) Turmeric, the natural indicator present in curry stain.

b) When turmeric is combined with any base liquid like it turns red in colour while when turmeric comes in contact with any substance like that of vinegar, that is acidic in nature, it turns yellow.

c) The nature of soap is basic


Hope it helps you.

$hweta✌☺

Answer 2

Answer:

A. Turmeric

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

C. Soap is basic in nature..