Chemistry Alcohols & Phenols MDCAT 2013
PMDC Verified Question 90 of 95
OH (1) NO2 (2) NO2 (4) NO2 (6)


is named as
A
Nitro phenol
B
Malonic acid
C
Benzoic acid
D
Picric acid
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Picric acid
Concept:

When phenol undergoes extensive electrophilic aromatic substitution with a nitrating mixture, it gets fully nitrated at all ortho and para positions.

Formula:

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

Solution:

  • The structure shown has three nitro groups at the 2, 4, and 6 positions of the phenol ring.


  • The common trivial name for 2,4,6-trinitrophenol is picric acid.


Why other options are incorrect:

Nitro phenol usually refers to a mono-nitrated species. Benzoic acid has a -COOH group instead of -OH. Malonic acid is an aliphatic dicarboxylic acid.

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