if you are working with a strong acid the lithmus paper will turn red.
base changes red litmus blue. it retains the blue colour of blue litmus paper.
litmus paper turns blue litmus red when tested on an acid and red litmus blue when tested on a base
it turns blue litmus paper red
As soap is alkaline in nature, it turns red litmus paper blue
blue
blue litmus paper turns to red when its in contact with acid
The color of litmus will be blue.
Litmus become blue in contact with basic substances.
The colour is not changed.
Red litmus paper turn blue. But blue one is not responding.
Well if you place blue litmus paper in saliva and it turns red, then the saliva is acidic. If you put red litmus in the saliva and it turns blue, then the saliva is alkaline. However, if the red litmus doesn't change colour and the blue litmus doesn't change colour, the saliva would be neutral.
In an acid solution the blue litmus paper become red.