Chemistry Fundamental Principles of Organic Chemistry ETEA 2023
PMDC Verified Question 25 of 83
Pyrrole belongs to which class of compounds:
A
Hydrocarbons
B
Homocyclic
C
Alicyclic
D
Heterocyclic
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Heterocyclic
Concept:

Cyclic organic compounds are divided into homocyclic (only carbon in the ring) and heterocyclic (at least one non-carbon atom in the ring).

Solution:

  • Pyrrole is a five-membered aromatic ring with the formula \( \text{C}_4\text{H}_4\text{NH} \).


  • Because the ring structure contains a nitrogen atom (a heteroatom) in addition to carbon atoms, it is classified as a heterocyclic compound.


Why other options are incorrect:

It is not a hydrocarbon because it contains nitrogen. It is not homocyclic or alicyclic because those refer to all-carbon rings.

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