Question

Why do soap solution turn mythleorange to yellow and turmeric to red?

Answer 1

because it is basic in nature

Answer 2

Methyl orange and phenolphthalein use as indicator , In Acidic solution Methyl orange gives red colour but in basic solution it gives yellow colour . In Acidic solution phenolphthalein is colourless but in basic it gives pink colour . They both are used as a pH indicator .