Q. 4. Account for the following: (a...
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Q. 4. Account for the following: (a) BF3 molecule has zero dipole moment although B-F bonds are polar. (b) The structure of NH, is pyramidal. [NCT-2010]

JEE/Engineering Exams
Chemistry
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a) BFz molecule thas Rero dipole moment becouse As three bond moment give a net Sum of Rel as the resultant of ang two us equal ( ) Opposik to the Thired (b) The slructure ( a f(H)_{3} ) is 7 yramidal due to presence of lone pair of clecsoson an ( Q ) due to the replusion btw ( 1 p- ) op ( ( ) which is more than bp-t Afe angle b tw. bond Tels is reduced to ( frac{107}{5} ) from ( frac{109 cdot 5^{circ}}{-} )
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