Which of following indicators is used in the titration of oxalic acid with sodium hydroxide solution?

Options

A. Phenolpthein
B. Methyl red
C. Methyl orange
D. Bromophenol blue

Answer

1

Explanation

Phenolphthalein is the best indicator for the detection of equivalence point in the titration of a weak acid (such as oxalic acid) and a strong base (such as sodium hydroxide). This is because its `pK_("In")` (i.e., the pH at which its color changes) lies in the basic range (Above 7 at `25^(@)C)`.