Question

what is Litmus Paper. where it is used .how is it used for identifying acid and base.

Answer 1

litmus paper is a dry paper of red and blue colour and when change it colour then identify as acid or base

Answer 2

Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity.