Question

when red litmus paper is added to likewater then what will be the change in litmus paper

Answer 1

when a drop of lime water is added to red litmus paper the colour changes to blue due to its basic nature

Answer 2

Litmus papers are indicators. Red litmus papers indicate base or alkali.Bases have pH ranging from 7.1 to 14.0 in the pH scale. On the other hand, blue litmus papers indicate acid. Acids have pH ranging from 0.1 to 6.9 in the pH scale.

Water is neutral. Its pH is 7.0. So, if a blue litmus paper or a red litmus paper is dipped in pure water, its color remains unchanged.