Answer :
SO2 has a larger dipole moment than SO3 molecule in each pair has the greater dipole moment
Dipole moment (μ) measures the net molecular polarity, which is the product of charge Q and the distance r between the charges μ=Q×r thus, the larger the difference in electronegativities of bonded atoms, the larger the dipole moment. the SO3 molecule has zero dipole moment SO3 (sulfur trioxide) molecule has the highly symmetrical trigonal planar geometry and each one of the individual S-O bond in the species is equally polar. trigonal planar with each O double bonded to S. so no dipole moment inSO3.
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