Which of the following compounds has the leas | vedclass

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(D) The dipole moment of a molecule depends on its geometry and the polarity of its bonds.$BF_3$ has a trigonal planar geometry with three $B-F$ bonds

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$BF_3$

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(D) The dipole moment of a molecule depends on its geometry and the polarity of its bonds.$BF_3$ has a trigonal planar geometry with three $B-F$ bonds oriented at $120^{\circ}$ to each other.Due to the symmetric arrangement,the resultant dipole moment of the three $B-F$ bonds cancels out to zero.$PH_3$,$CHCl_3$,and $NH_3$ all have non-zero dipole moments due to their pyramidal or asymmetric structures.Therefore,$BF_3$ has the least dipole moment.

Which of the following compounds has the least dipole moment?

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