Question

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

• A. Blue litmus paper turns red
• B. Blue litmus paper turns dark blue
• C. Blue litmus paper turns black
• D. No change will occur

Answer 1

The correct option is A

Blue litmus paper 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.