Question

what happens when we react a shampoo solution with yellow turmeric paper

Answer 1

turmeric in basic or neutral solutions is yellow, in reasonably midly basic solutions it starts turning red, reaching the maximum intensity of read in strongly basic solutions.
as shampoo is basic so it will turn into red

Answer 2

Turmeric is a natural acid-base indicator.

Turmeric is yellow in acid and neutral substances, but turns bright red with bases.We know that the shampoo is a base.So when we add shampoo to a turmeric solution then the color of the solution turns red.