Question

Which of the following is an incorrect match ?

• A. $Cl{O}_3^{-}$, $s{p}^2$
• B. $S{O}_4^{2-}$, $s{p}^3$
• C. $N{O}_3^{-}$, $s{p}^2$
• D. $Cl{O}_4^{-}$, $s{p}^3$

Answer 1

Answer: (A)

$X=\frac{1}{2}[VE+MA-c+a]$
where, $X=$ No. of hybrid orbitals.
$VE=$ No. of valence electrons of the central atom
$MA=$ No. of monovalent atoms/groups surrounding the central atom.
$c$ = charge on the cation
$a$= charge on the anion
$Cl{O}_3^{-};X=\frac{1}{2}\left[7+0-0+1\right]=4,s{p}^3$
$N{O}_3^{-};X=\frac{1}{2}\left[5+0-0+1\right]=3,s{p}^2$
$S{O}_4^{2-};X=\frac{1}{2}\left[6+0-0+2\right]=4,s{p}^3$
$Cl{O}_4^{-};X=\frac{1}{2}\left[7+0-0+1\right]=4,s{p}^3$