Despite Fluorine being more electronegative than Hydrogen, the dipole moment of () is significantly higher than that of (). This anomaly occurs because:

Question

Despite Fluorine being more electronegative than Hydrogen, the dipole moment of $NH_3$ ($1.47	ext{ D}$) is significantly higher than that of $NF_3$ ($0.23	ext{ D}$). This anomaly occurs because:

Prashant Kotian · Accepted Answer

Correct answer: B. Both are pyramidal. In , bond dipoles point toward N, reinforcing the lone pair's upward vector. In , bond dipoles point toward the highly electronegative F atoms (away from N), opposing and mostly cancelling the upward lone pair vector.

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