Question

Select the correct statement regarding shapes of $PC{l}_5,Br{F}_5$ and $I{F}_7$.

• A. All are square pyramidal.
• B. All are trigonal bipyramidal.
• C. One of the following is square pyramidal
• D. one of the following is tetrahedral

Answer 1

Answer: (C)

$PC{l}_5$ [see image]
$bp=5$
Total $=5$
$S{p}^{3}d$ Trigonal bipyramidal
$Br{F}_5$ [see image]
$bp=5$
$Ip=1$
Total $=6$
$S{p}^3{d}^2$
square pyramidal
$I{F}_7$ [see image]
$bp=7$
$Ip=0$
Total $=7$
$S{p}^3{d}^3$
pentagonal bipyramidal