Question

Which of the following molecules do not obey the octet rule in any of the important Lewis structures needed to describe the bonding in the molecule?

• A. $N{O}_2$
• B. $AsC{l}_3$
• C. $S{F}_4$
• D. $Cl{O}_3^{-}$

Answer 1

Answer: (A), (C), (D)

The correct options are
A $N{O}_2$
C $S{F}_4$
D $Cl{O}_3^{-}$

$N{O}_2$ is having only 7 electrons on nitrogen including an odd electron on the central atom.

$AsC{l}_3$ has 8 elctrons on cetral atom so its octet is satisfied.

$S{F}_4$ is having 10 valence electrons, including one lonepair.
$Cl{O}_3^{-}$ is also having extended octet on $Cl$.