Question

What do you observe on pouring potassium hydroxide on red and blue litmus papers?

• A. Red litmus remains red and blue litmus turns to red
• B. Red litmus turns to blue and blue litmus remains blue
• C. Red litmus becomes colorless and blue litmus remains blue
• D. Red litmus turns to blue and blue litmus turns to red

Answer 1

The Correct Option is B

Potassium hydroxide (KOH) is a strong base. It turns red litmus paper blue and blue litmus paper red. This is because red litmus paper turns blue in a basic solution, while blue litmus paper turns red in an acidic solution. Since potassium hydroxide is basic, it causes this color change.
Thus, the correct answer is Red litmus turns to blue and blue litmus turns to red.