Chemistry Alcohols & Phenols PMC 2021
PMDC Verified Question 59 of 95
Picric acid is
A
Monocarboxylic
B
Dicarboxylic acid
C
Tricarboxylic acid
D
Acidic phenol
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Acidic phenol
Concept:

Despite having "acid" in its trivial name, picric acid does not contain a carboxyl (-COOH) group.

Formula:

$$ \text{C}_6\text{H}_2(\text{NO}_2)_3\text{OH} $$

Solution:

  • The IUPAC name of picric acid is 2,4,6-trinitrophenol.


  • Because of the three highly electron-withdrawing nitro groups, the OH bond is severely weakened, making it unusually acidic for a phenol (comparable to mineral acids).


  • Structurally, it is an acidic phenol.


Why other options are incorrect:

It contains zero -COOH groups, entirely ruling out options A, B, and C.

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