The orientation of electron pairs and the shape of molecule are different in

The approximate shape of a molecule can often be predicted by using what is called the valence-shell electron-pair repulsion (VSEPR) model. Electrons in bonds and in lone pairs can be thought of a ''charge cloud'' that repel one another nad stay as far apart as possible, thus causing molecules to assume specific shapes. The repulsive interactions of electron pairs decrease in the order: Lone pair - Lone pair gt Lone pair - Bond pair gt Bond pair - Bond pair These repulsive effects result in deviations from idealised shapes and alteration in bond angles in molecules. Among the following molecules. (P) XeO_(3)" (Q)"XeOF_(4) (R) XeO_(2)F_(2)" (S)"XeF_(5) Those having different molecular geometry but same number of lone pairs on Xe are :

The number of electrons that are paired in oxygen molecule is

Why does the presence of a lone pair change the shape of the molecule?

According to VSEPR theory, the most probable shape of the molecule having 4 electrons pairs in the outer shell of the central atom is