What colour does litmus paper change to when it is dipped in an alkali?

Litmus paper is a common pH indicator used to determine the acidity or alkalinity of a substance. When litmus paper is dipped in an alkali (a basic or alkaline solution), it changes its color to blue. Litmus paper contains a mixture of dyes that are sensitive to changes in pH. In acidic solutions, the litmus paper turns red, while in alkaline solutions, it turns blue. This color change occurs due to the chemical reactions between the dyes and the hydrogen ions (H+) or hydroxide ions (OH-) present in the solution. Therefore, if litmus paper is dipped in an alkali, it will show a blue color, indicating the alkalinity of the solution. To learn more about paper, brainly.com/question/14619524 #SPJ11