A) boron is a metal and nitrogen is a gas in uncombined state
B) \[B{{F}_{3}}\] bonds have no dipole moment whereas \[N{{F}_{3}}\] bond have dipole moment.
C) Atomic size of boron is smaller than that of nitrogen
D) \[B{{F}_{3}}\] is symmetrical molecule whereas \[N{{F}_{3}}\] is unsymmetrical
Correct Answer: D
Solution :
\[B{{F}_{3}}\] is symmetrical planar molecule, although it has polar bonds but resultant dipole moment is zero. In \[N{{F}_{3}}\] lone pair cause distortion hence it is unsymmetrical and polar molecule.You need to login to perform this action.
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