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Question


Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions respectively are


A

red and blue

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B
blue and red
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C

pink and colourless

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D

colourless and pink

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Solution

The correct option is D

colourless and pink


Phenolphthalein is often used as an indicator in acid-base titrations. It turns colourless in acidic solutions and pink in basic solutions.


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