JEE Advance - Chemistry (1998 - No. 3)
Interpret the non-linear shape of H2S molecule and non-planar shape of PCl3 using valence shell electron pair repulsion (VSEPR) theory. (Atomic numbers : H = 1, P = 15, S = 16, Cl = 17)
H2S has two bond pairs and two lone pairs around the central S atom, resulting in a tetrahedral electron geometry and a bent molecular geometry.
PCl3 has three bond pairs and one lone pair around the central P atom, resulting in a tetrahedral electron geometry and a trigonal pyramidal molecular geometry.
The lone pairs in both molecules repel the bond pairs, causing deviations from ideal bond angles.
H2S is linear due to the electronegativity difference between H and S.
PCl3 is planar due to the large size of chlorine atoms.
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