Question

Which of the following compound do not have a bond angle of ${109.5}^o$?

• A. Methane. $C{H}_4$
• B. $H_3{O}^{+}$
• C. Carbon tetrachloride $CC{l}_4$
• D. $N{H}_4^{+}$

Answer 1

The correct option is B $H_3{O}^{+}$

$C{H}_4$ molecule has a steric number of 4 and has no lone pair of electrons are present so its geometry is tetrahedral and has a bond angle of ${109.5}^o$.


$CC{l}_4$ has a steric number of 4 and is $s{p}^3$ hybridised
Since no lone pair of electrons are present in the central atom, its geometry will be tetrahedral.

For $H_3{O}^{+}$, hybridisation is $s{p}^3$ ans central atom Oxygen has lone pair of electron so it has as hape of trigonal pyramidal.

$N{H}_4^{+}$ has a tetrahedral shape with zero lone pair on central atom and four hydrogen atoms occupying the corners.