Question

what is a litmus ???.....

Answer 1

here is the answer
Litmus is a water soluble mixture of different dyes extracted from lichens

Answer 2

litmus is used to identify a substance whether it is acidic or basic in nature...there are mainly two types of litmus made from barks of some specific plants...mainly blue and red litmus....blue litmus turns red if acid.and red litmus turns blue when basic.....