Chemical Bonding and Molecular Structure · Question 30

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Among SO2, NF3, NH3, XeF2, ClF3 and SF4, the hybridization of the molecule with nonzero dipole moment and highest number of lone-pairs of electrons on the central atom is

sp3
dsp2
sp3d2
sp3d

Answer

(4) sp3d

Solution

Lone pairs on the central atom and polarity:

SO2: 1 lp, bent polar

NF3, NH3: 1 lp each, pyramidal polar

XeF2: 3 lp, linear dipole moment zero (rejected)

ClF3: 2 lp, T-shaped polar

SF4: 1 lp, see-saw polar

The polar molecule with the most lone pairs is ClF3: 3 bond pairs + 2 lone pairs = 5 electron pairs sp3d.

Answer: (4)

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Keep practising — Chemical Bonding and Molecular Structure

Which among the following molecules is (a) involved in sp3d hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?

XeF4
XeF2
PF5
SF4

JEE Main 2025 (Online) 2nd April Evening Shift

An element 'E' has the ionisation enthalpy value of 374 kJ mol-1. 'E' reacts with elements A, B, C and D with electron gain enthalpy values of −328, −349, −325 and −295 kJ mol-1, respectively. The correct order of the products EA, EB, EC and ED in terms of ionic character is :