For different structural arrangements of atoms having the formula XeF₂Cl₂,which structures represent polar molecules? (Black = Xe,Yellow = F,Green = Cl)

Question

Quizplus · Accepted Answer

In structure I, the Xe atom is surrounded by four fluorine atoms in a tetrahedral arrangement, which gives the molecule a symmetrical shape and makes it nonpolar. 
In structure III, the Xe atom is surrounded by six beryllium atoms in an octahedral arrangement and does not have any polar bonds. Thus, it is also nonpolar. 
In structure II, the Xe atom is surrounded by three fluorine atoms and one chlorine atom. The Xe-F bonds are polar due to the difference in electronegativity between Xe and F, and the Xe-Cl bond is also polar. The molecule has a trigonal pyramidal shape, which makes it polar overall. Therefore, B is the correct answer.

For Different Structural Arrangements of Atoms Having the Formula XeF2Cl2,which

For Different Structural Arrangements of Atoms Having the Formula XeF₂Cl₂,which