Question

Which of the following will be trigonal planar?

• A. $PC{l}_3$
• B. $N{H}_3$
• C. $Cl{F}_3$
• D. $AlC{l}_3$

Answer 1

Answer: (D)

In $AlC{l}_3$ molecule, central Al-atom is sp ${}^2$ hybridised.

$H=\frac{1}{2}[3+3-0+0]=3$