Question

A compound with the molecular formula $C_{5}H_{5}N$ and having 3 double bonds will be ________.

• A. heterocyclic and aromatic
• B. homocyclic and aromatic
• C. heterocyclic and non-aromatic
• D. homocyclic and non-aromatic

Hint:

Pyridine is the classic example of a $C_5H_5N$ heterocyclic aromatic compound.

Answer 1

The Correct Option is A

Step 1: Concept
Identify the structure based on molecular formula and unsaturation.
Step 2: Analysis
The formula $C_5H_5N$ with 3 double bonds describes Pyridine.
Step 3: Characterization

• Heterocyclic: The ring contains a nitrogen atom in addition to carbons.
• Aromatic: It is cyclic, planar, and follows Hückel's rule ($4n+2$) with $6\pi$ electrons ($n=1$).

Step 4: Conclusion
Hence, the compound is heterocyclic and aromatic.
Final Answer:(A)