Litmus paper will turn red in sulphuric acid.
Purple litmus (neutral) become red in acidic solutions.
Litmus turns red when exposed to an acidic solution. Litmus is red in acid and blue in alkali.
In an acid solution the blue litmus paper become red.
hydrochloric acid usually has pH 1 which turns litmus Red
It will remain red
As Lemon Juice is an Acid, the colour of the Red Litmus Paper will stay the same.
- sodium chloride is not an acid - in an acid solution the blue litmus paper become red
Litmus is red at a pH under 4,5.