Question

as you know that when we add a litmus paper into acid it turns blue Litmus to red litmus if I had a same Litmus Paper into basic will it turn into blue Litmus or remain same so what about the solution like phenolphthalein and methyl Orange

Answer 1

if you add blue litmus paper in basic it will remain same.
phenolphthalein is colourless in colour but when added in basic it turns pink in colour

methyl orange turns yellow in colour when added into basic solution.