Question

Which of the following solution will turn red hibiscus paper to blue?

• A. Vinegar
• B. Buttermilk
• C. Soap
• D. Water

Answer 1

The correct option is C

Soap

Hibiscus is a natural indicator. Red hibiscus turns blue in a basic solution and blue hibiscus turns red in an acidic solution. Buttermilk contains lactic acid and vinegar contains acetic acid. Since both are acidic in nature they will not turn red hibiscus to blue. Soap is basic in nature and it will turn red hibiscus to blue. However, indicators do not show any colour change in the neutral solution. Therefore, it will stay red in water.