It turns blue.
Litmus paper is blue when dipped in an alkaline solution, and red when placed in an acidic solution. The colors begin to merge when you test pH neutral liquids.
Litmus paper turns blue when placed in basic solutions. This color change occurs due to a change in the pH level of the solution, causing the litmus paper to reflect the alkaline nature of the solution.
Blue litmus does not change when placed in a basic solution.
If there is no color change when a drop of solution is placed on red litmus paper, it indicates that the solution is neutral. This means that the solution has a pH around 7, neither acidic nor basic.
An alkaline solution, such as sodium hydroxide (NaOH), will change red litmus paper to blue. Alkaline solutions have a pH above 7, causing the red litmus paper to turn blue due to the presence of hydroxide ions that react with the indicator dye.
Blue in Base
Blue.
An aqueous solution of borax is basic in nature. When litmus paper is dipped into the solution, it will turn blue or remain blue, indicating that it is a base. Litmus paper changes color in response to the pH level of the solution it is placed in.
Nothing - red litmus paper indicates the presence of bases.
I think it is supposed to be PURPLE. Because of the following:It turns red when placed in acidic solutionIt turns blue when placed in alkaline solutionAnd purple when placed in neutral.
When blue litmus paper is placed in soapy water, it remains blue because soap is typically alkaline (basic). Litmus paper is used to test pH levels, and blue litmus paper indicates a neutral or basic environment. If the water were acidic, the blue paper would turn red, but in this case, the soapy water keeps it blue.
It won't change, it is already red (coke is acid).