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Answer: 4. 11, 3, 1

Key idea: Count bonds in pyridine, \(\mathrm{C_5H_5N}\) (a six-membered ring with 3 C=C/C=N double bonds).

  • \(\sigma\) bonds: 6 ring bonds + 5 C-H = 11.
  • \(\pi\) bonds: 3 (one per double bond).
  • Lone pairs: 1, on nitrogen (in the plane, not part of the aromatic sextet).

Answer: 11, 3, 1. Option 4.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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