Which of the following indicator is the best indicator for the detection of end point in the titration of $C H_{3} C O O H$ and $K O H$ ?

Methyl orange

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Phenolphthalein

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Methyl red

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None of the above

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Solution

The correct option is B Phenolphthalein
The product formed is $C H_{3} C O O K$ which is salt of weak acid and a strong base $K O H$ . Hence, its pH lies in basic range and phenolphthalein is the best indicator for detecting basic range.

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