A solution turns phenolphthalein indicator pink. The most likely pH of the solution will be:
(a) 6
(b) 4
(c) 9
(d) 7

Academic Chemistry NCERT Class 10

Correct Answer: (c) 9

Explanation: Phenolphthalein is a colourless indicator used in acid-base titration to identify whether a solution is acidic or basic in nature. It turns pink to indicates basic medium. Therefore, the pH should be greater than 7.

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Updated on: 10-Oct-2022

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