Explain the non linear shape of H_(2)S and non planar shape of PCl_(3)using valence shell electron pair repulsion theory .

Explain the non linear shape of H_(2)S and non planar shape of PCl_(3)

1.	Explain the non linear shape of H_(2)S and non planar shape of PCl_(3)using valence shell electron pair repulsion theory .
Answer» Solution :In `H_(2) O ` atomic number of central atom (S) = 16 ELECTRONIC arrangment of S = 2, 8, 6 Out of 6 valence eletrons , TWO electrons are shared with two H atoms and the REMAINING four electrons are present as two lone pairs . Thus, we hgave i.e., it is a molecule of the type `AB_(2)L_(2)` . Due to repulsions between bond pairs and lone pairs the shape is bent (non-linear). In `PCl_(3)` atomic number of central atom (P) = 15 Electronic ARRANGEMENT of P = 2, 8, 5 Out of 5 valence eleectrons , three electrons are shared with three Cl atoms and the remaining 2 electrons are Present as one lone pair. thus, we have i.e., it is a molecule of the type `AB_(3) L `. To minimiserepulsions between lone pairs bond pairs, the shape becomes pyramidal (non-planar).