Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Ram was given a jar filled with vinegar. What would be his observation when he adds a drop of phenolphthalein in this jar?

• A. Water turns pink in colour
• B. Water turns red in colour
• C. Water turns blue in colour
• D. Water remains colourless

Answer 1

The correct option is D Water remains colourless

Phenolphthalein is a synthetic indicator and remains colourless when added to acidic or a neutral solution. But the colour changes to pink when added to basic/alkaline solution.
Since vinegar is a acidic in nature, so adding phenolphthalein to it does not cause any colour change in the solution.