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Answer: 3. \(SbCl_5\)

Key idea: a molecule is non-polar if its bond dipoles cancel by symmetry.

\(\mathrm{SbCl_5}\) is a symmetric trigonal bipyramid with no lone pair, so the dipoles cancel (net zero). \(\mathrm{POCl_3}\) (distorted tetrahedral with one P=O), \(\mathrm{CH_2O}\) (planar with unlike substituents) and \(\mathrm{NO_2}\) (bent) are polar.

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