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Question

For the titration between oxalic acid and sodium hydroxide, the indicator used is

A
Potassium permanganate
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B
Phenolphthalein
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C
Litmus
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D
Methyl orange
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Solution

The correct option is A Phenolphthalein
Oxalic acid is titrated against NaOH. Phenolphthalein is chosen because it changes color in a pH range between 8 – 10. It appears pink in basic solutions and colourless in acidic solutions.
In the case of a strong acid-strong base titration, this pH transition would take place within a fraction of a drop of actual neutralization, since the strength of the base is high.

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