Question

The colour of litmus paper in the soap solution is
(1) Red
(2) Blue
(3) Pink
(4) Purple

Answer 1

Litmus Paper is an indicator but the colour change depends upon the colour of Litmus Paper if it is red and is dipped in soap solution then the red colour will change into blue but if it is of blue colour then it will remain blue we can say that any Litmus Paper se red or blue changes to read when dipped in soap solution as it is a basic substance

Answer 2

Blue may this helps you