Question

why oxalic acid doesn't give flourescence test?
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Answer 1

Answer:

In sodium bicarbonate test use acid free alcohol so that it should not interfere with the functional group of the given organic compound. ... Dicarboxylic acids like oxalic acid, terephthalic acid and isophthalic acid do not give fluorescein test.

Answer 2

OXALIC ACID DOES NOT GIVE FLUORESCENCE TEST-

• Use acid-free alcohol in the sodium bicarbonate test so that the functional group of the provided organic molecule is not harmed.

• In an aqueous solution, oxalic acid is a weak acid that will only ionize slightly.
• Oxalic acid is made up of two acidic protons.
• Fluorescence testing is not possible with dicarboxylic acids such as oxalic acid, terephthalic acid, or isophthalic acid.