What color does blue litmus paper turn when dipped into an acidic solution?

Explanation

Litmus paper turns red in the presence of an acid and turns blue again in the presence of a base, making it a simple and widely used indicator for testing acidity. Litmus is a natural dye extracted from lichens. Common household acids like vinegar and lemon juice would turn blue litmus paper red. Explore more Everyday Science MCQs on mcqstutor to keep practicing.