Question

MOLECULE OF MAXIMUM DIPOLE MOMENT IS
H2O
NH3
NF3
SiCI4

Answer 1

In short: H2O has a slightly higher dipole moment than HF, as found experimentally. ... H20 has 2 bonds, so the dipole moments add up. But the bonds are at an angle so the effect is not huge. HF has only 1 bond, but that bond is more polar as H and F have a bigger difference in electronegativity as compared to H and O.

The molecular geometry is pyramidal for both the molecules. In each molecule, N atom has one lone pair. F is more electronegative than H and N−F bond is more polar than N−H bond. Hence, NF3 is expected to have much larger dipole moment than NH3.

Explanation :

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