Question

What happens to blue litmus paper when it is dipped in vinegar?

• A. It turns red.
• B. It turns dark blue.
• C. It turns black.
• D. It turns green.

Answer 1

The correct option is A It turns red.

Litmus is an acid-base indicator which changes its colour when exposed to an acidic or basic solution. Blue litmus paper turns red in an acidic solution and red litmus paper turns blue in a basic solution. Since vinegar is acidic, it turns blue litmus paper to red.