The study of diple moment of a molecule is useful to explain the shape of a molecule and also to predict a The net dipole moment of a polyatomic molecule is the resltant of the different bond moments present in that molecule . The values are generalluy expressed in Debye or in the S.I. units in terms of Coulomb meter (C m) Which our of the following will have maximum dipolemoment ?

The study of diple moment of a molecule is useful to explain the shape

1.	The study of diple moment of a molecule is useful to explain the shape of a molecule and also to predict a The net dipole moment of a polyatomic molecule is the resltant of the different bond moments present in that molecule . The values are generalluy expressed in Debye or in the S.I. units in terms of Coulomb meter (C m) Which our of the following will have maximum dipolemoment ?
Answer» `NF_(3)` `NCl_(3)` `NBr_(3)` `NH_(3)` Solution : F is more electronegative than N ,N-F bond OPPOSES the bond moment of N with the LONE pair . In all order cases , it favours but electronegativity differenceis maximum between N and H . Hence, `NH_(3)` has maximum DIPOLE moment . (Electronegativity of Cl = N = 3.0)