Which has a permanent dipole moment?

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Question

(D) molecule has a permanent dipole moment if its net dipole moment $\mu 
eq 0$.$1$. $CO_3^{2-}$ has a trigonal planar geometry,and the bond dipoles

Vedclass · Accepted Answer

$NH_3$

Vedclass · Answer

(D) molecule has a permanent dipole moment if its net dipole moment $\mu 
eq 0$.$1$. $CO_3^{2-}$ has a trigonal planar geometry,and the bond dipoles cancel each other out,so $\mu = 0$.$2$. $SO_4^{2-}$ has a tetrahedral geometry,and the bond dipoles cancel each other out,so $\mu = 0$.$3$. $CS_2$ has a linear geometry $(S=C=S)$,and the bond dipoles cancel each other out,so $\mu = 0$.$4$. $NH_3$ has a trigonal pyramidal geometry with a lone pair on the nitrogen atom. The bond dipoles of the $N-H$ bonds and the lone pair do not cancel each other,resulting in a net dipole moment $\mu 
eq 0$. Thus,$NH_3$ has a permanent dipole moment.

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