What will be the colour of phenolphthalein solution on adding oxalic acid?

colourless`

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pink

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blue

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orange

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Solution

The correct option is A colourless`
Since oxalic acid is acidic in nature and as we know colour of phenolphthalein is pink in basic solution and colourless in acidic solution. Hence colour of phenolphthalein will remain colourless.

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