Answer
i. $PCL_{5}$
ii. $SF_{6}$
iii. $XeF_{2}$
iv.$ IF_{7}$
Work Step by Step
i. $PCL_{5}$ have 10 shared electrons, hence exceeding octet rule.
ii. $SF_{6}$ have 12 shared electrons, hence exceeding octet rule.
iii. $XeF_{2}$ have 3 lone pairs and 4 shared electrons (total 10), hence exceeding octet rule.
iv. $ IF_{7}$ have 14 shared electrons, hence exceeding octet rule.
