Question

An aqueous solution ‘X’ turns Phenolphthalein Solution pink. On adding the aqueous Solution ‘Y’ to ‘X’ the pink colour disappears. Which of the following statements is true for Solution ‘X’ and ‘Y’? A. ‘X’ is strongly basic, and ‘Y’ is a weak base. B. ‘X’ is strongly acidic, and ‘Y’ is a weak acid. C. ‘X’ is a basic solution and ‘Y’ is an acidic solution. D. ‘X’ is an acidic solution and ‘Y’ is a basic solution.​

Answer 1

Answer:

c) X is an basic y is acid cuz, base turns phenolphthalein pink while acid doesn't affect its colour.

Hope you are satisfied!

Answer 2

C. ‘X’ is a basic solution and ‘Y’ is an acidic solution.

• Phenolphthalein is an acid base indicator which used to determine the end points in acid base titration. It is one of the most common and important synthetic indicators in laboratories.
• Phenolphthalein remains colourless when tested with acids and shows pink colour when tested with basic solution.
• Therefore, here X will be a basic solution as it turns into pink and Y will be an acidic solution as it remains colourless.