Question

The (i)_________ change their colour when added to a solution containing an acidic
or a basic substance. (ii)________ solution is obtained from Lichens as it is used to
detect the acidic or basic nature of the substance. It changes its colour to (iii)_________
in acidic medium and into (iv)_________ in basic medium.

Answer 1

Answer:

Litmus is extracted from lichens. It has a mauve (purple) colour in distilled water. When added to an acidic solution, it turns red and when added to a basic solution, it turns blue.

Answer 2

all 4 four answer is litmus