1. Tardigrade
  2. Question
  3. Chemistry
  4. Interpret the non-linear shape of H2S molecule and non-planar shape of PCI3 using valence shell electron pair repulsion (VSEPR) theory. (Atomic number: H = 1, P = 15, S = 16, Cl = 17).

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Q. Interpret the non-linear shape of $H_2S$ molecule and
non-planar shape of $PCI_3$ using valence shell electron pair
repulsion (VSEPR) theory. (Atomic number : H = 1,
P = 15, S = 16, Cl = 17).

IIT JEEIIT JEE 1998

Solution:

In $H_2 S$, S is $sp^3$ -hybridised with two lone pairs of electrons
on it giving V-shaped (water like) shape. In $PCI_3$, P is
$sp^3$-hybridised with one lone pair of electrons on it.
Therefore, $PCI_3$ is pyramidal in shape.