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ClF3 is the molecule with a t-shaped geometry. Here's why:
ClF3: Chlorine (Cl) has 7 valence electrons and forms 3 single bonds with fluorine (F). It also has two lone pairs of electrons. This arrangement leads to a trigonal bipyramidal electron geometry and a t-shaped molecular geometry.
PCl3: Phosphorus (P) has 5 valence electrons and forms 3 single bonds with chlorine (Cl). It also has one lone pair. This results in a tetrahedral electron geometry and a trigonal pyramidal molecular geometry.
NCl3: Nitrogen (N) has 5 valence electrons and forms 3 single bonds with chlorine (Cl). It also has one lone pair. This results in a tetrahedral electron geometry and a trigonal pyramidal molecular geometry.
O3: Ozone (O3) has a bent molecular geometry due to the presence of a lone pair on the central oxygen atom.