Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are
(a) red and blue
(b) blue and red
(c) pink and colourless
(d) colourless and pink

Academic Chemistry NCERT Class 7

Correct Answer: (d) colourless and pink

Explanation: Phenolphthalein remains colourless in acidic solution and turns pink in basic solution.

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Updated on: 01-Feb-2023

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