blue
Milk of magnesia is basic, so it will turn red litmus paper blue and have no effect on blue litmus paper.
Red litmus paper will turn blue in the presence of milk, indicating a basic pH. Blue litmus paper will remain blue, as milk is not acidic enough to change its color.
the color of the litmus paper does not change.
Milk is generally neutral in pH, typically around 6 to 7, so it does not significantly affect blue litmus paper. When blue litmus paper is exposed to milk, it will remain blue, indicating that there is no acidic property present to change its color. If the milk were to spoil and become acidic, it might turn the blue litmus paper red, but fresh milk will not.
red
Evaporated milk is a white-colored liquid, so if it turns red under red litmus paper, it indicates that the milk is acidic. This change in color suggests the presence of acidic substances in the evaporated milk, which can be detected by red litmus turning red in an acidic environment.
Methanol is a neutral substance and typically does not change the color of litmus paper. Litmus paper changes color in the presence of acidic or alkaline substances.
Milk of magnesia is chemically known as magnesium hydroxide. Although this compound isn't very water soluble, the small amount that does dissolve acts as a base. Thus, milk of magnesia is somewhat basic, and litmus paper would turn blue if exposed to it. Nice....
Blue litmus paper remains blue when dipped in milk of magnesia because milk of magnesia is basic in nature.
The color of litmus paper in acidic solutions is red.
Acid turns litmus paper red.
Litmus paper turns blue in a base.