Which indicator is used in the titration of sodium hydroxide...

Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?

Options

APhenolphthalein, pink to yellow
BAlkaline $\mathrm{KMnO}_4$ , colourless to pink
CPhenolphthalein, colourless to pink
DMethyl orange, yellow to pinkish red colour

Correct answer

C. Phenolphthalein, colourless to pink

Step-by-step solution

For weak acid and strong base titration, phenolphthalein is used as indicator. In acidic medium phenolphthalein is colourless while in alkaline medium it is pink in colour.

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