BCl3 - Boron Trichloride:

First draw the Lewis dot structure:
BCl3 Lewis Structure
Electron geometry: trigonal planar. Hybridization: sp2

Then draw the 3D molecular structure using VSEPR rules:

The molecular geometry of BCl3 is trigonal planar with symmetric charge distribution around the central atom.
Therefore this molecule is nonpolar.

Boron Trichloride on Wikipedia.

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