How to explain the shape of molecules using VSEPR theory?

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Solution

The principle of VSEPR is that the valence electron pairs surrounding an atom tend to repel each other, and will, therefore, adopt an arrangement that minimizes this repulsion, thus determining the molecule's geometry. The repulsion between two lone pairs is maximum, repulsion between lone pair and bond pair is intermediate and bond pair-bond pair repulsion is the least. According to this, the structures of molecules of different types are:

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According to the VSEPR theory, the geometry and shape of the molecule depends upon:

{P C l}_{5}

{B r F}_{5}

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