Nothing-it won't measure ph of gases.
there natural color it did not change their color
the litmus paper turns red when in contact with phosphoric acid
i think purple Acid does not change the color of red litmus paper.
Blue litmus does not change when placed in a basic solution.
If you add red litmus paper and it remains red, then you add blue litmus paper and it remains blue, then the the solution is neutral. Kamal
Some substances do not change the color of litmus paper because they are neither acid or nor base. They are called neutral substances.
water
The color of litmus will be blue.
Red
pH paper would turn a different color depending on the type of paper. However, blue litmus paper will turn red when put in an acid. Red litmus paper will not change at all.
there natural color it did not change their color
Litmus does not change color in sugar solution.
If it is blue litmus paper ,then it turns red. But if its red litmus paper, it doesn't change color.
THE COLOUR of the litmus paper will not change as a salt solution is neutral
No an acid will only change the litmus paper red regardless of of the substance color.
the litmus paper turns red when in contact with phosphoric acid
water.