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The dipole moment of a molecule of the form AB_n depends on:
AOnly the magnitude of individual bond dipoles
BBoth the magnitudes of individual bond dipoles and their spatial arrangement (vector sum)
COnly the spatial arrangement of bonds
DThe molecular mass
Answer & Solution
Correct answer: B. Both the magnitudes of individual bond dipoles and their spatial arrangement (vector sum)
μ_total is the **vector sum** of the individual bond dipoles. Symmetric arrangements (linear AB₂, trigonal planar AB₃, tetrahedral AB₄) can cancel to zero even with strongly polar bonds (e.g., CO₂, BF₃, CCl₄).
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